Wysypka po kontakcie z bluszczem trującym
Objawy

Wysypka po kontakcie z bluszczem trującym jest reakcją alergiczną na urushiol, oleistą żywicę obecna w bluszczu trującym, dębie jadowitym i sumaku jadowitym. Objawy pojawiają się zwykle w ciągu 12-48 godzin u osób z wcześniejszą ekspozycją, a u osób bez wcześniejszego kontaktu nawet po 2-3 tygodniach. Charakterystyczne symptomy to intensywne swędzenie, zaczerwienienie, obrzęk oraz pęcherzyki wypełnione płynem, które pękając, nie rozprzestrzeniają urushiolu. Wysypka rozwija się etapami, osiągając szczyt w ciągu 1-14 dni, a jej czas trwania wynosi od 1 do 14 dni u osób z wcześniejszą wrażliwością i do 21 dni lub dłużej u osób bez wcześniejszej ekspozycji. Nasilenie reakcji zależy od wrażliwości skóry, ilości urushiolu oraz lokalizacji zmian, z cięższymi objawami na cienkiej skórze twarzy i narządów płciowych.

Wysypka po kontakcie z bluszczem trującym – Objawy

Wysypka po kontakcie z bluszczem trującym (poison ivy rash) jest reakcją alergiczną na oleistą żywicę zwaną urushiol, która znajduje się w liściach, łodygach i korzeniach bluszcza trującego, dębu jadowitego oraz sumaka jadowitego. Kontakt z tą substancją wywołuje u większości osób charakterystyczną wysypkę skórną, która może być bardzo swędząca i utrzymywać się przez kilka tygodni12.

Czas wystąpienia objawów

Reakcja alergiczna po kontakcie z urushiolem zazwyczaj rozwija się w ciągu 12-48 godzin po ekspozycji, ale może pojawić się w różnym czasie, w zależności od tego, czy pacjent miał wcześniej kontakt z rośliną12. U osób, które wcześniej miały kontakt z bluszczem trującym, wysypka może pojawić się już w ciągu kilku godzin (4-48 godzin) po ekspozycji12. Natomiast u osób, które nigdy wcześniej nie miały kontaktu z urushiolem, pierwsze objawy mogą wystąpić dopiero po 2-3 tygodniach od ekspozycji12.

Charakterystyczne objawy

Główne objawy wysypki po kontakcie z bluszczem trującym obejmują12:

  • Intensywne swędzenie (jest to zazwyczaj pierwszy objaw, pojawiający się nawet przed widoczną wysypką)12
  • Zaczerwienienie skóry1
  • Obrzęk1
  • Pęcherzyki wypełnione płynem1
  • Problemy z oddychaniem w przypadku wdychania dymu z palących się roślin bluszczu trującego1

Wysypka często pojawia się w linii prostej lub w formie pasków, co odzwierciedla sposób, w jaki roślina otarła się o skórę12. Jednak jeśli kontakt z urushiolem nastąpił poprzez dotykanie zanieczyszczonych ubrań lub sierści zwierząt, wysypka może być bardziej rozproszona1.

Progresja wysypki po kontakcie z bluszczem trującym

Wysypka po kontakcie z bluszczem trującym zwykle rozwija się etapami i osiąga szczyt w ciągu 1-14 dni od kontaktu z urushiolem1. Przebieg reakcji alergicznej można podzielić na kilka charakterystycznych faz.

Fazy rozwoju wysypki

W większości przypadków, wysypka po kontakcie z bluszczem trującym przechodzi przez następujące etapy12:

  1. Intensywne swędzenie – skóra zaczyna intensywnie swędzieć w miejscu, gdzie później pojawi się wysypka. Swędzenie może być tak silne, że budzi pacjenta ze snu12.
  2. Pojawienie się wysypki – wkrótce po rozpoczęciu swędzenia pojawia się czerwona, zapalona wysypka w miejscu kontaktu z urushiolem. U większości osób jest to intensywna, pęcherzykowa wysypka12.
  3. Tworzenie się pęcherzyków – na wysypce pojawiają się pęcherzyki wypełnione płynem, które mogą mieć różne rozmiary. Pęcherzyki mogą pojawić się w różnym czasie w różnych miejscach ciała12.
  4. Pękanie pęcherzyków – pęcherzyki pękają, wydzielając przezroczysty płyn. Należy pamiętać, że płyn z pęcherzyków nie zawiera urushiolu i nie może rozprzestrzeniać wysypki12.
  5. Tworzenie się strupów – pęcherze zasychają i tworzą się strupy, ale miejsce nadal może swędzieć12.

Może wydawać się, że wysypka się rozprzestrzenia, ale w rzeczywistości pojawiają się nowe wykwity w miejscach, które miały kontakt z urushiolem1. Różne obszary skóry mogą wchłaniać olej w różnym tempie, co powoduje, że wysypka pojawia się w różnym czasie w różnych miejscach12.

Czas trwania wysypki

Czas trwania wysypki po kontakcie z bluszczem trującym zależy od kilku czynników, w tym od wrażliwości skóry osoby dotkniętej oraz od tego, czy miała ona wcześniej kontakt z urushiolem12:

  • U osób, które wcześniej miały wysypkę po kontakcie z bluszczem trującym, dębem jadowitym lub sumakiem jadowitym, wysypka zazwyczaj utrzymuje się od 1 do 14 dni12.
  • U osób, które nigdy wcześniej nie miały takiej wysypki, objawy mogą utrzymywać się przez 21 dni lub dłużej12.

W większości przypadków wysypka po kontakcie z bluszczem trującym ustępuje samoistnie w ciągu 1-3 tygodni12. Rzadko wysypka może utrzymywać się dłużej niż miesiąc1.

Ciężkość i zmienność objawów

Nasilenie wysypki i swędzenia może być różne u różnych osób i zależy od kilku czynników12:

  • Wrażliwość skóry na urushiol – około 85% Amerykanów jest uczulonych na bluszcz trujący, przy czym około 10-15% z nich może mieć ciężką reakcję12.
  • Ilość urushiolu, który wszedł w kontakt ze skórą – im więcej oleju znajdzie się na skórze, tym cięższa będzie reakcja12.
  • Obszar ciała dotknięty wysypką – reakcje są zwykle cięższe w miejscach, gdzie skóra jest cieńsza, np. na twarzy i narządach płciowych1.

Niektóre osoby mogą rozwinąć jedną lub dwie małe wysypki, podczas gdy inne mogą mieć wysypki na całym ciele12. Intensywność swędzenia również może być różna1.

Rzadkie warianty wysypki

Warto wspomnieć, że u niektórych osób wysypka po kontakcie z bluszczem trującym może mieć nietypowy wygląd1:

  • U niektórych osób mogą pojawić się czarne plamy lub smugi na skórze zamiast typowej czerwonej wysypki (jest to rzadkie)12.
  • W przypadku zapalenia skóry z czarnymi plamami po kontakcie z bluszczem trującym, obrzęk i zaczerwienienie są minimalne lub nie występują wcale1.

Potencjalne powikłania wysypki po kontakcie z bluszczem trującym

Chociaż w większości przypadków wysypka po kontakcie z bluszczem trującym ustępuje samoistnie bez powikłań, w niektórych przypadkach mogą wystąpić poważniejsze problemy zdrowotne1.

Infekcja bakteryjna

Jednym z najczęstszych powikłań wysypki po kontakcie z bluszczem trującym jest infekcja bakteryjna. Powtarzające się drapanie może powodować mikroskopijne uszkodzenia skóry, przez które bakterie mogą przedostać się do organizmu i wywołać zakażenie12. Objawy infekcji bakteryjnej obejmują12:

  • Zwiększone zaczerwienienie i obrzęk
  • Ocieplenie skóry w miejscu wysypki
  • Ropna wydzielina z pęcherzyków
  • Gorączka (może być oznaką wtórnej infekcji bakteryjnej)

Ciężka reakcja alergiczna

W rzadkich przypadkach może wystąpić ciężka reakcja alergiczna na urushiol, która może być poważna lub nawet zagrażająca życiu12. Objawy ciężkiej reakcji alergicznej obejmują12:

  • Znaczny obrzęk, szczególnie twarzy, ust, szyi lub narządów płciowych (powieki mogą być tak opuchnięte, że zamykają się)1
  • Trudności z oddychaniem lub przełykaniem1
  • Rozległe pęcherze, które wydzielają dużo płynu1

Jeśli po kontakcie z bluszczem trującym pojawią się problemy z oddychaniem lub przełykaniem, należy natychmiast szukać pomocy medycznej. Jest to stan nagły, który może stać się śmiertelny bez odpowiedniego leczenia1.

Reakcja systemowa

W niektórych przypadkach urushiol może zostać wchłonięty do krwiobiegu, powodując reakcję alergiczną w całym organizmie, a nie tylko w miejscu kontaktu. Ten rodzaj reakcji może prowadzić do rozległych wysypek, obrzęków i innych objawów wykraczających poza obszar ekspozycji1.

Kiedy szukać pomocy medycznej

Chociaż większość przypadków wysypki po kontakcie z bluszczem trującym można leczyć w domu, w niektórych sytuacjach należy skonsultować się z lekarzem12. Należy szukać pomocy medycznej w następujących przypadkach:

  • Wysypka obejmuje dużą część ciała lub znajduje się na twarzy lub narządach płciowych1
  • Wysypka pogarsza się pomimo leczenia domowego1
  • Skóra wygląda na zainfekowaną (zwiększone zaczerwienienie, ciepło, ból, obrzęk lub ropa)1
  • Pojawia się gorączka1
  • Wysypka nie ustępuje po 2-3 tygodniach1

Należy natychmiast udać się na pogotowie, jeśli występują12:

  • Trudności z oddychaniem lub przełykaniem
  • Obrzęk twarzy, języka lub gardła
  • Rozległe obszary zaczerwienienia lub obrzęku
  • Dużych rozmiarów pęcherze, które wydzielają dużo płynu

W przypadku ciężkiej wysypki lekarz może przepisać doustny kortykosteroid, taki jak prednizon, aby zmniejszyć obrzęk i złagodzić objawy12.

Zapobieganie szerzeniu się wysypki

Istnieje wiele błędnych przekonań dotyczących rozprzestrzeniania się wysypki po kontakcie z bluszczem trującym. Warto wiedzieć, że12:

  • Wysypka pojawi się tylko tam, gdzie olej roślinny dotknął skóry, więc osoba z wysypką po kontakcie z bluszczem trującym nie może rozprzestrzenić jej na ciele poprzez drapanie1.
  • Może wydawać się, że wysypka się rozprzestrzenia, jeśli pojawia się w różnym czasie, a nie jednocześnie. Jest to spowodowane tym, że olej roślinny jest wchłaniany w różnym tempie w różnych częściach ciała lub z powodu powtarzającego się kontaktu z zanieczyszczonymi przedmiotami lub olejem roślinnym uwięzionym pod paznokciami1.
  • Nawet jeśli pęcherze pękną, płyn w pęcherzach nie jest olejem roślinnym i nie może dalej rozprzestrzeniać wysypki1.
  • Wysypka po kontakcie z bluszczem trującym nie jest zakaźna i nie może być przenoszona z osoby na osobę poprzez dotykanie pęcherzy lub z płynu wewnątrz pęcherzy12.
  • Jednak urushiol może być przenoszony pod paznokciami i na ubraniach; jeśli inna osoba wejdzie w kontakt z urushiolem, może rozwinąć zapalenie skóry po kontakcie z bluszczem trującym1.

Aby zapobiec rozprzestrzenianiu się wysypki, należy jak najszybciej umyć skórę, ubrania i wszystkie przedmioty, które mogły mieć kontakt z urushiolem1.

Różnice w objawach u różnych osób

Reakcja na urushiol może znacznie różnić się u poszczególnych osób12. Około 50-85% osób rozwija objawy i oznaki zapalenia skóry po kontakcie z bluszczem trującym, przy czym objawy i ich nasilenie różnią się w zależności od osoby12. Czynniki wpływające na różnice w objawach obejmują:

  • Wcześniejszą ekspozycję na urushiol i rozwiniętą wrażliwość1
  • Indywidualną wrażliwość skóry1
  • Ilość urushiolu, który wszedł w kontakt ze skórą1
  • Obszar ciała narażony na kontakt1

Warto pamiętać, że około 15% populacji jest naturalnie odporna na urushiol i może nie doświadczyć żadnej reakcji, w tym typowej wysypki lub innych objawów kontaktowego zapalenia skóry, nawet po ekspozycji1. Wrażliwość może również zmieniać się z czasem, a ktoś, kto nie reagował w przeszłości, może rozwinąć wrażliwość później w życiu1.

Kolejne rozdziały

Zapraszamy do dalszego czytania naszego leksykonu.

Wybierz kolejny rozdział z menu poniżej, aby otworzyć nową podstronę kompedium wiedzy i uzyskać szczegółowe informację o leku, substancji lub chorobie.

  1. 17.04.2026
  2. www.leksykon.com.pl

Materiały źródłowe

  • #1 Poison ivy rash – Symptoms and causes – Mayo Clinic
    https://www.mayoclinic.org/diseases-conditions/poison-ivy/symptoms-causes/syc-20376485
    Poison ivy rash is caused by an allergic reaction to an oily resin called urushiol (u-ROO-she-ol). This oil is in the leaves, stems and roots of poison ivy, poison oak and poison sumac. […] If you develop a rash, it can be very itchy and last for weeks. […] Signs and symptoms of a poison ivy rash include: Redness, Itching, Swelling, Blisters, Difficulty breathing, if you’ve inhaled the smoke from burning poison ivy. […] Poison ivy rash often appears in a straight line because of the way the plant brushes against your skin. […] The reaction usually develops 12 to 48 hours after exposure and lasts two to three weeks. […] The severity of the rash depends on the amount of urushiol that gets on your skin.
  • #1 Poison ivy, oak, and sumac: When does the rash appear?
    https://www.aad.org/public/everyday-care/itchy-skin/poison-ivy/rash-appear
    The amount of time it takes for a rash to appear depends on whether you’ve had a rash from one of the plants before. Here’s the general rule: […] A rash usually appears within 4 to 48 hours. […] It typically takes 2 to 3 weeks. […] When this oil touches your skin, it can cause an allergic reaction. Anyone who develops an allergic reaction gets a rash. […] If several tiny pieces land on you or someone else, many rashes can develop. […] You won’t notice the oil on your skin; however, most people recognize the rash if they’ve had it before.
  • #1 Poison ivy, oak, and sumac: What does the rash look like?
    https://www.aad.org/public/everyday-care/itchy-skin/poison-ivy/what-rash-looks-like
    A rash from one of these poisonous plants usually shows up as red, itchy bumps on the skin. […] It takes time for the rash to appear. A rash can develop in a few hours if you’ve had a rash from one of these plants before. If you’ve never had a rash from poison ivy, oak, or sumac, it can take 2 to 3 weeks before you see a rash. […] No matter how long it takes for the rash to appear, most people experience the following when they get a rash: The skin itches intensely where the rash will appear. The itch can be so intense that it wakes you from a sound sleep. Shortly after your skin starts to itch, the rash appears. Most people develop an itchy, red, and blistering rash. If you have blisters, they break open and leak fluid. The blisters crust over, and the rash clears in 2 to 3 weeks. The rash will clear without treatment, but it can be extremely itchy until it clears completely.
  • #1 From Contact to Recovery: More About Poison Ivy Rash Stages
    https://www.afcurgentcare.com/blog/poison-ivy-rash-stages/
    The first sign that your skin is reacting to the plant is often an intense itch. […] The itching can begin before any visible rash appears, making it one of the earliest indicators that your body is responding to urushiol. […] After the initial itching, the rash begins to make its appearance. This phase is marked by the development of a red, swollen, and blistering rash that can spread across the skin. […] As the rash progresses, many people will experience the formation of small, fluid-filled blisters on the affected areas of the skin. […] As the rash enters the final stage, the blisters will begin to dry out and form a crust. This is a sign that your skin is starting to heal.
  • #1 Poison Ivy Rash, Poison Oak, Poison Sumac: Symptoms, Causes & Treatment
    https://my.clevelandclinic.org/health/diseases/10655-poison-plants-poison-ivy–poison-oak–poison-sumac
    No matter how long it takes for a rash to appear, it usually comes in stages and peaks within one to 14 days of exposure. […] However, symptoms can develop as long as 21 days after initial exposure to urushiol oil for those who’ve never been in contact with it before. […] For most people, the stages of poison ivy rash include: […] Itching: Your skin will begin itching intensely where the rash will eventually appear. […] Rash: Soon after your skin begins to itch, the rash will appear. […] For most people, it’s an intense, blistering rash. […] Fluid-filled blisters: If you’ve developed blisters, they’ll break open and leak fluid. […] Crusting and itching: The blisters will crust over but will still be itchy. […] It may look like your rash is spreading, but you’re actually developing new rashes on areas of skin that came into contact with urushiol oil.
  • #1 Poison ivy rash | Health Library | Memorial Health System
    https://www.mhsystem.org/health-library/con-20376467/
    Poison ivy rash is caused by an allergic reaction to an oily resin called urushiol (u-ROO-she-ol). This oil is in the leaves, stems and roots of poison ivy, poison oak and poison sumac. […] If you develop a rash, it can be very itchy and last for weeks. […] Signs and symptoms of a poison ivy rash include: Redness, Itching, Swelling, Blisters, Difficulty breathing, if you’ve inhaled the smoke from burning poison ivy. […] Poison ivy rash often appears in a straight line because of the way the plant brushes against your skin. But if you develop a rash after touching a piece of clothing or pet fur that has urushiol on it, the rash may be more spread out. The reaction usually develops 12 to 48 hours after exposure and lasts two to three weeks. […] The severity of the rash depends on the amount of urushiol that gets on your skin. […] If you scratch a poison ivy rash, bacteria under your fingernails may cause the skin to become infected. […] Poison ivy treatments usually involve self-care methods at home. And the rash typically goes away on its own in two to three weeks.
  • #1 Outsmarting Poison Ivy and Other Poisonous Plants | FDA
    https://www.fda.gov/consumers/consumer-updates/outsmarting-poison-ivy-and-other-poisonous-plants
    First comes the itching, then a red rash, and then blisters. These symptoms of poison ivy, poison oak, and poison sumac can emerge any time from a few hours to several days after exposure to the plant oil found in the sap of these poisonous plants. The culprit: the urushiol oil. […] The rash will occur only where the plant oil has touched the skin, so a person with poison ivy cant spread it on the body by scratching. It may seem like the rash is spreading if it appears over time instead of all at once. But this is either because the plant oil is absorbed at different rates on different parts of the body or because of repeated exposure to contaminated objects or plant oil trapped under the fingernails. Even if blisters break, the fluid in the blisters is not plant oil and cannot further spread the rash. […] The rash, blisters, and itch normally disappear in several weeks without any treatment.
  • #1 What Does Poison Ivy Rash Look Like? Symptoms to Know | SELF
    https://www.self.com/story/what-does-poison-ivy-rash-look-like
    The rash is very, very itchy and the blisters may be fluid-filled and ooze. […] As it begins to heal, it will often become flatter and scaly, and the color may fade. […] The rash may last for several weeks. If youre very sensitive to poison ivy, the rash may last up to six weeks. […] This is actually because varying parts of the skin that came in contact with the plant may absorb the oil at different rates, so the rash may appear at different times. […] A poison ivy rash doesnt usually cause long-term symptoms or skin damage, but you may notice some areas of hyperpigmentation or slightly darker skin where the rash formed. […] If you notice pus oozing from the blisters, warmth in the area, or a fever, its time to call your doctor.
  • #1 Poison Ivy Rash, Poison Oak, Poison Sumac: Symptoms, Causes & Treatment
    https://my.clevelandclinic.org/health/diseases/10655-poison-plants-poison-ivy–poison-oak–poison-sumac
    The extent of the rash depends on your skin sensitivity and how much oil you touched. […] Poison ivy rashes cause mild (but annoying) symptoms that go away within a week or two. […] Rarely, a skin rash can last for longer than a month. […] Poison oak and poison sumac rashes should go away within one to two weeks.
  • #1 Poison ivy, oak, and sumac: What does the rash look like?
    https://www.aad.org/public/everyday-care/itchy-skin/poison-ivy/what-rash-looks-like
    The intensity of the itch and severity of the rash can differ from person to person. Some people develop 1 or 2 small rashes. Others develop rashes all over. […] How long you have a rash depends on whether you’ve had a rash from one of these plants before. Here’s the general rule: Previous rash from poison ivy, oak, or sumac: The rash tends to last 1 to 14 days before it clears on its own. Never had a rash from poison ivy, oak, or sumac: You can have a rash for 21 days or longer before it goes away.
  • #1 Poison Ivy Rash: Symptoms and Treatment | Dermatology Affiliates
    https://www.dermatologyaffiliates.com/conditions/poison-ivy-rash
    A poison ivy rash occurs when your skin comes into contact with the urushiol oil found in poison ivy, oak, or sumac plants, leading to an itchy, red rash that may develop bumps or blisters. […] Poison ivy rash symptoms usually appear quickly about 12 to 48 hours after contact. […] Symptoms may last for two to three weeks and almost always require some form of treatment. […] Typical symptoms of poison ivy rash include redness, itching, swelling, and blisters. […] The rash typically lasts 1-3 weeks, and while it can be uncomfortable, it usually goes away on its own.
  • #1 Poison Ivy Rash: Pictures, Symptoms, and Treatment
    https://www.healthline.com/health/outdoor-health/poison-ivy-pictures-remedies
    About 85 percent of Americans are allergic to poison ivy. These people will experience mild, but irritating, symptoms, such as a red rash, itching, and swelling. Of those who are allergic, about 10 to 15 percent will have a severe reaction. They may develop fluid-filled blisters that become infected. […] A severe poison ivy allergy causes: severe swelling, difficulty breathing, blisters that become inflamed and infected. […] A poison ivy rash is bothersome. The itching and swelling can be irritating. Rarely, a poison ivy rash can be serious or fatal. When this happens, its often the result of complications caused by the reaction. […] Complications of a poison ivy rash include: A bacterial infection is a common complication of a poison ivy rash. Repeated scratching can cause microscopic breaks in the skin. Bacteria can make their way into the breaks, and an infection can develop. […] If you begin experiencing breathing or swallowing difficulties after coming into contact with poison ivy, seek treatment right away. This is an emergency situation that could become deadly without proper treatment.
  • #1 Allergic reactions caused by poison ivy | Gouvernement du Québec
    https://www.quebec.ca/en/health/health-issues/a-z/allergic-reactions-caused-by-poison-ivy
    The symptoms of an allergic reaction to poison ivy usually appear 24 to 48 hours after contact with the sap. […] The first sign of an allergic reaction to poison ivy is a strong itching with redness at the site of contact. […] Afterwards, lesions may appear: Inflammation, Swelling, Blistering, Crusting when blisters burst and leak. […] The seriousness of an allergic reaction depends on: The persons degree of sensitivity, The amount of sap that comes into contact with the skin, The area of the body affected. […] The most serious allergic reactions affect areas of the body where the skin is thin, like the face and the genitals. […] Symptoms may be more severe in people who have had a significant allergic reaction to poison ivy in the past. […] In most cases, symptoms last 7 to 10 days. When reactions are more severe, it can take up to 3 weeks to heal.
  • #1 Poison Ivy Rash, Poison Oak, Poison Sumac: Symptoms, Causes & Treatment
    https://my.clevelandclinic.org/health/diseases/10655-poison-plants-poison-ivy–poison-oak–poison-sumac
    Poison ivy symptoms almost always include: […] An itchy skin rash. […] Redness and swelling. […] Blisters. […] Depending on your skin’s sensitivity, a rash may develop within a few hours or a few days after initial contact with urushiol oil. […] The intensity of the itching can vary, and some people may develop one or two small rashes while others develop rashes all over their bodies. […] A poison ivy rash on your skin usually looks like red, itchy bumps. […] Some people can develop black spots or streaks on their skin instead of the telltale red rash (this is rare). […] If you have black-spot poison-ivy dermatitis, you’ll have very little or no swelling or redness. […] Poison oak rash and poison sumac rash look the same as poison ivy rash. […] This is because urushiol oil causes the same allergic reaction no matter which poisonous plant you touch.
  • #1 Poison ivy rash – Diagnosis and treatment – Mayo Clinic
    https://www.mayoclinic.org/diseases-conditions/poison-ivy/diagnosis-treatment/drc-20376490
    Rashes typically appear red, slightly raised or swollen with occasional blisters. […] The hallmark for people is that the intense itching that they will feel from it and almost burning, and then redness on their skin. It can get infected if you itch it, and you open up one of the welts. […] The rash typically goes away after a few weeks.
  • #1 Poison Ivy, Oak, or Sumac Information & Treatment
    https://www.columbiadoctors.org/health-library/condition/poison-ivy-oak-or-sumac/
    Poison ivy, oak, and sumac are plants that can cause a red, itchy rash called allergic contact dermatitis. It is the most common skin problem caused by contact with plants. […] The usual symptoms are: Itching. Red streaks or general redness where the plant touched the skin. Small bumps or larger raised areas (hives). Blisters that may leak fluid. […] In people who are very allergic to the oil, even a little may cause serious symptoms that need medical attention right away, such as: Trouble breathing. Swelling of the face, mouth, neck, or genitals. The eyelids may swell shut. Widespread, large blisters that ooze a lot of fluid. […] The rash usually takes more than a week to show up the first time you have a reaction to the oil. It develops in a day or two on later contacts. The rash may form in new areas over several days, but you will only get a rash where the oil touched your skin. […] The rash usually lasts about 10 days to 3 weeks. But it may last up to 6 weeks in more severe cases.
  • #1 Having a Poison Ivy Reaction | DCSI Florida DermatologyHaving a Poison Ivy Reaction | DCSI Florida Dermatology
    https://www.mydcsi.com/conditions/skin/inflammatory-skin/poison-ivy-reaction/
    If a person has a bad reaction to poison ivy, they may experience severe symptoms beyond the typical rash and itching. These symptoms can include widespread blistering, significant swelling, and intense itching. The rash can sometimes become infected, leading to complications such as cellulitis, which requires antibiotic treatment. […] A systemic poison ivy reaction occurs when the urushiol oil from poison ivy is absorbed into the bloodstream, causing an allergic reaction throughout the body rather than just at the site of contact. This type of reaction can cause widespread rashes, swelling, and other symptoms beyond the area of exposure. In severe cases, it can lead to symptoms such as difficulty breathing, fever, and swelling of the face or throat, which require immediate medical attention.
  • #1 What to Do About Poison Ivy (for Parents) | Nemours KidsHealth
    https://kidshealth.org/en/parents/poison-ivy-sheet.html
    Poison ivy, poison oak, and poison sumac plants contain an oil (called urushiol) that can cause an allergic rash in most people who have contact with it. The plants look different, but they cause the same type of symptoms. […] Mild rashes can be treated at home, and mostly cause discomfort from itching, burning, or blistering. Severe, widespread rashes require medical treatment. […] What Are the Signs Symptoms of Poison Ivy? itching, a red rash that starts within 4 hours to 4 days after touching the plant oil, blisters that ooze clear fluid, bumps and blisters that may be different sizes and look like streaks on the skin, rash may begin to look crusty as it heals, which might take a few weeks. […] Call the doctor if: the rash covers a large portion of the body or is on the face or genitals, the rash is getting worse despite home treatment, the skin looks infected (increasing redness, warmth, pain, swelling, or pus).
  • #1 10 Things to Know About Poison Ivy Rash
    https://mydoctor.kaiserpermanente.org/mas/news/10-things-to-know-about-poison-ivy-rash-2184009
    More serious symptoms may cause difficulty breathing or facial swelling. In these cases, seek medical attention immediately. […] Scratching a poison ivy rash can worsen the situation. Scratching the rash and blisters may lead to a bacterial infection. Fever may be a sign that a secondary bacterial infection has developed.
  • #1 Poison Ivy: Diagnosis, Treatment, and When to Seek Help | Poison Control
    https://www.poison.org/articles/poison-ivy
    Poison ivy can cause a rash if someone touches it, which is caused by oils in the plant. The rash can be severe enough to blister and itch for days or weeks. […] Intense itchiness and a rash can develop in as few as 12 days after exposure in people who have had a reaction to poison ivy before. For people who have not experienced a previous reaction, the onset of symptoms can occur as late as 2 weeks after exposure. The itchiness and rash are often followed by the development of red bumps (papules) and fluid-filled blisters. […] The reaction takes several weeks to go away. During this time, the poison ivy sufferer can be pretty miserable. […] The rash does not get better within a few weeks.
  • #1 What to Do About Poison Ivy (for Parents) | Nemours KidsHealth
    https://kidshealth.org/en/parents/poison-ivy-sheet.html
    Get Emergency Medical Care for Poison Ivy if Your Child: has a known severe allergy to poison ivy, poison oak, or poison sumac, has swelling of the tongue or throat, complains of chest tightness or trouble breathing, develops large areas of redness or swelling, was given a shot of epinephrine (EpiPen).
  • #1 Poison ivy rash | Beacon Health System
    https://www.beaconhealthsystem.org/library/diseases-and-conditions/poison-ivy-rash?content_id=CON-20376467
    Poison ivy rash is caused by an allergic reaction to an oily resin called urushiol (u-ROO-she-ol). This oil is in the leaves, stems and roots of poison ivy, poison oak and poison sumac. […] If you develop a rash, it can be very itchy and last for weeks. […] Signs and symptoms of a poison ivy rash include: Redness, Itching, Swelling, Blisters, Difficulty breathing, if you’ve inhaled the smoke from burning poison ivy. […] Poison ivy rash often appears in a straight line because of the way the plant brushes against your skin. […] The reaction usually develops 12 to 48 hours after exposure and lasts two to three weeks. […] The severity of the rash depends on the amount of urushiol that gets on your skin. […] If you scratch a poison ivy rash, bacteria under your fingernails may cause the skin to become infected. […] Poison ivy treatments usually involve self-care methods at home. And the rash typically goes away on its own in two to three weeks. […] If the rash is widespread or causes many blisters, your doctor may prescribe an oral corticosteroid, such as prednisone, to reduce swelling.
  • #1 Patient education: Poison ivy (Beyond the Basics) – UpToDate
    https://www.uptodate.com/contents/poison-ivy-beyond-the-basics
    After contact with urushiol, approximately 50 percent of people develop signs and symptoms of poison ivy dermatitis. The symptoms and severity differ from person to person. […] The most common signs and symptoms of poison ivy dermatitis are: Intense itching, Skin swelling and blisters, Skin redness. […] These symptoms usually develop within four hours to four days after exposure to the urushiol. After the initial symptoms, allergic individuals develop fluid-filled blisters in a line or streak-like pattern. The symptoms are worse within 1 to 14 days after touching the plant, but they can develop up to 21 days later if one has never been exposed to urushiol before. […] The blisters can occur at different times in different people; blisters can develop on the arms several days after blisters on the hands developed. This does not mean that the reaction is spreading from one area of the body to the other. The fluid that leaks from blisters does not spread the rash. Poison ivy dermatitis is not contagious and cannot be passed from person to person. However, urushiol can be carried under fingernails and on clothes; if another person comes in contact with the urushiol, he or she can develop poison ivy dermatitis.
  • #1 Recognizing Poison Ivy, Oak and Sumac | Children’s Hospital of Philadelphia
    https://www.chop.edu/news/health-tip/recognizing-poison-ivy-oak-and-sumac
    You can develop a rash by touching poison ivy, oak or sumac, or by touching something that recently came into contact with the oil, such as other people, clothing, and/or pets. […] The body’s allergic response to the plant toxins may not appear for several days, and severity can change from person to person. The skin will become red and swollen, and then blisters will appear. […] After a few days, the blisters will become crusty and start to flake off. They can take one to two weeks to heal. […] The rash itself is very itchy and uncomfortable. The spreading of the poison to other people or objects can be avoided by washing off the oil. […] Most allergic reactions will clear up in 14 to 21 days. However, if the symptoms persist or worsen, contact a doctor for further treatment.
  • #1 What Does Poison Ivy Rash Look Like? Symptoms to Know | SELF
    https://www.self.com/story/what-does-poison-ivy-rash-look-like
    Poison ivy rash comes from contact with the poison ivy plant. […] If you spend any time outside gardening, picking up your dogs poop, or generally walking or hiking through green space, chances are you may accidentally come in contact with this plant and experience the blistering rash its known to cause. […] This sap, which is also found in poison oak and poison sumac, is called urushiol and can cause a severe rash that lingers for weeks. […] A poison ivy rash requires sensitization, which means that the first time you come in contact with it, you may not have a reaction. But the next time and every time after, it has the power to cause an itchy, angry skin reaction. […] When a poison ivy rash first starts, it is usually inflamed, swollen, and itchy. […] There are often blisters seen with the rash.
  • #1 Having a Poison Ivy Reaction | DCSI Florida DermatologyHaving a Poison Ivy Reaction | DCSI Florida Dermatology
    https://www.mydcsi.com/conditions/skin/inflammatory-skin/poison-ivy-reaction/
    Approximately 85% of people are allergic to urushiol and will develop a rash upon contact. However, about 15% of people are naturally resistant to urushiol and may not experience any reaction, including the typical rash or other symptoms of contact dermatitis, even after exposure. […] Sensitivity can also change over time, and someone who did not react in the past may develop a sensitivity later in life. Even if someone does not react initially, they can become sensitized over time, leading to an allergic reaction upon future exposures.
  • #2 Poison ivy rash | Beacon Health System
    https://www.beaconhealthsystem.org/library/diseases-and-conditions/poison-ivy-rash?content_id=CON-20376467
    Poison ivy rash is caused by an allergic reaction to an oily resin called urushiol (u-ROO-she-ol). This oil is in the leaves, stems and roots of poison ivy, poison oak and poison sumac. […] If you develop a rash, it can be very itchy and last for weeks. […] Signs and symptoms of a poison ivy rash include: Redness, Itching, Swelling, Blisters, Difficulty breathing, if you’ve inhaled the smoke from burning poison ivy. […] Poison ivy rash often appears in a straight line because of the way the plant brushes against your skin. […] The reaction usually develops 12 to 48 hours after exposure and lasts two to three weeks. […] The severity of the rash depends on the amount of urushiol that gets on your skin. […] If you scratch a poison ivy rash, bacteria under your fingernails may cause the skin to become infected. […] Poison ivy treatments usually involve self-care methods at home. And the rash typically goes away on its own in two to three weeks. […] If the rash is widespread or causes many blisters, your doctor may prescribe an oral corticosteroid, such as prednisone, to reduce swelling.
  • #2 Poison Ivy Rash, Poison Oak, Poison Sumac: Symptoms, Causes & Treatment
    https://my.clevelandclinic.org/health/diseases/10655-poison-plants-poison-ivy–poison-oak–poison-sumac
    Poison ivy symptoms almost always include: […] An itchy skin rash. […] Redness and swelling. […] Blisters. […] Depending on your skin’s sensitivity, a rash may develop within a few hours or a few days after initial contact with urushiol oil. […] The intensity of the itching can vary, and some people may develop one or two small rashes while others develop rashes all over their bodies. […] A poison ivy rash on your skin usually looks like red, itchy bumps. […] Some people can develop black spots or streaks on their skin instead of the telltale red rash (this is rare). […] If you have black-spot poison-ivy dermatitis, you’ll have very little or no swelling or redness. […] Poison oak rash and poison sumac rash look the same as poison ivy rash. […] This is because urushiol oil causes the same allergic reaction no matter which poisonous plant you touch.
  • #2 Poison Ivy, Oak, and Sumac Skin Rashes: Symptoms and Treatments | BENADRYL®
    https://www.benadryl.com/itchy-skin/poison-ivy-oak-sumac-rashes-symptoms-relief
    Poison ivy, poison oak, and poison sumac rashes vary from person to person. Symptoms can include: […] The first symptom of contact with poison ivy, oak, or sumac is usually intense itching. After the itching starts, a rash develops. The amount of time it takes to appear depends on whether you have had a rash before from poison ivy, oak, or sumac. […] If you have had a rash before from poison ivy, oak, or sumac, the rash tends to develop within a few hours. […] If you have never had a rash before from poison ivy, oak, or sumac, it can take days or even a week or more after exposure for a rash to appear. […] The itching caused by these poisonous plants can be very intense. If you’re wondering what poison ivy, oak or sumac looks like on skin it can vary, as some people develop rashes in one or two areas, and some people develop a rash all over. If you have blisters, they can break open and leak fluid and as the blisters heal, they crust over.
  • #2 Poison Ivy Rash: Causes and Treatment | Riva Dermatology
    https://www.rivaderm.com/conditions/poison-ivy-rash
    Poison ivy rash is an allergic reaction to urushiol, an oily resin found in poison ivy, poison oak, and poison sumac plants. The rash appears as red, itchy, and blistering skin within 12 to 48 hours after contact with the plant. […] Typical symptoms of poison ivy rash include redness, itching, swelling, and blisters. […] Symptoms typically appear within 12 to 48 hours after contact with the plant and include red, itchy, and blistering skin. […] Symptoms may last for two to three weeks and almost always require some form of treatment.
  • #2 Poison Ivy Rash: How To Identify, Symptoms, Causes
    https://www.health.com/condition/skin-conditions/poison-ivy
    This rash may show up within a few hours or develop two to three weeks after contact with poison ivy. A poison oak and sumac rash will look the same because the urushiol oil is the culprit. […] People typically experience poison ivy rash symptoms in stages, which include: […] The first sign is typically intense itching on the area of the skin where the rash later forms. […] You will then develop a raised, itchy, inflamed rash where your skin has touched urushiol oil. The rash may show up in patches, lines, or streaks, which follow where the poison ivy comes in contact with your skin. […] Some people develop fluid-filled blisters, especially if the rash is severe. These blisters break open and ooze. […] The blisters will eventually crust over and continue to itch. […] Do not be surprised if the rash looks different on various parts of your body at different times. This is normal and does not necessarily mean the rash is getting worse.
  • #2 Poison Ivy Rash or Something Else? A Guide to Accurate Skin Condition Diagnosis | Healthy Skin Blog | The Skin Surgery Center
    https://www.skinsurgerycenter.net/blog/poison-ivy-rash-or-something-else-a-guide-to-accurate-skin-condition-diagnosis
    When dealing with an itchy, red rash, it can be challenging to determine whether its due to poison ivy or another skin condition. […] Identifying poison ivy rash involves recognizing its distinct characteristics, which are caused by contact with urushiol, a resin found in poison ivy, poison oak, and poison sumac. […] The appearance of the rash often presents in a linear or streaky pattern, reflecting the way the plant’s resin may have brushed against the skin. […] Initially, it typically appears as red, itchy patches that can develop into blisters. […] The rash usually occurs on areas of the skin that have come into direct contact with the plant and can appear on various parts of the body, including the arms, legs, and face. […] Symptoms generally manifest within 12 to 48 hours after exposure, making it relatively straightforward to trace back to a recent outdoor activity. […] Accurately distinguishing poison ivy rash from other skin conditions is key to effective treatment.
  • #2 When to See a Doctor for Poison Ivy – K Health
    https://khealth.com/learn/rash/when-to-see-a-doctor-for-poison-ivy/
    Poison ivy rashes can be caused by poison ivy, poison oak, and poison sumac plants. The rashes only appear where plant oil has directly touched the skin, although rashes do not always appear instantly. They may appear anywhere from 4 hours to 4 days after exposure. […] Signs and symptoms of poison ivy include: A red, streaky rash that may appear in patches, Red bumps that become large blisters that may burst, Extreme itchiness. […] Symptoms of poison ivy can range from mild to severe depending on the individuals sensitivity and the amount of plant oil exposure. The worst symptoms typically occur 4-7 days after exposure. Poison ivy rashes can last for 1-3 weeks. […] Poison ivy rashes typically develop in stages: First few hours or days: The poison ivy rash can appear as quickly as a few hours after exposure, or it may not show up for 3-4 days. If it takes longer to show up, it may appear in more places on the body if you did not know that you had been exposed.
  • #2 When to See a Doctor for Poison Ivy – K Health
    https://khealth.com/learn/rash/when-to-see-a-doctor-for-poison-ivy/
    Rash intensifies: After the initial rash appears, it may continue getting redder or itchier for a few more days. Even if it seems to be spreading, once the oil has been cleaned from the skin, it is not. However, inflammation from the itching could increase the redness, making it seem like it is getting worse. […] Blisters form: Blisters will typically form on the patchy rash, which may be small or large. Scratching will worsen skin reactions and the ability to heal, so try to avoid it. […] Blisters burst: The blisters will usually burst, but it is important not to pop them, which can lead to potential infection. The fluid from the blisters does not contain poison ivy oil and cannot spread the rash or any other infection. It will be clear and watery. If fluid from poison ivy appears yellow or a different color, it could be a sign of infection or that the rash is not poison ivy.
  • #2 Patient education: Poison ivy (Beyond the Basics) – UpToDate
    https://www.uptodate.com/contents/poison-ivy-beyond-the-basics
    After contact with urushiol, approximately 50 percent of people develop signs and symptoms of poison ivy dermatitis. The symptoms and severity differ from person to person. […] The most common signs and symptoms of poison ivy dermatitis are: Intense itching, Skin swelling and blisters, Skin redness. […] These symptoms usually develop within four hours to four days after exposure to the urushiol. After the initial symptoms, allergic individuals develop fluid-filled blisters in a line or streak-like pattern. The symptoms are worse within 1 to 14 days after touching the plant, but they can develop up to 21 days later if one has never been exposed to urushiol before. […] The blisters can occur at different times in different people; blisters can develop on the arms several days after blisters on the hands developed. This does not mean that the reaction is spreading from one area of the body to the other. The fluid that leaks from blisters does not spread the rash. Poison ivy dermatitis is not contagious and cannot be passed from person to person. However, urushiol can be carried under fingernails and on clothes; if another person comes in contact with the urushiol, he or she can develop poison ivy dermatitis.
  • #2 Poison ivy, oak, and sumac: What does the rash look like?
    https://www.aad.org/public/everyday-care/itchy-skin/poison-ivy/what-rash-looks-like
    The intensity of the itch and severity of the rash can differ from person to person. Some people develop 1 or 2 small rashes. Others develop rashes all over. […] How long you have a rash depends on whether you’ve had a rash from one of these plants before. Here’s the general rule: Previous rash from poison ivy, oak, or sumac: The rash tends to last 1 to 14 days before it clears on its own. Never had a rash from poison ivy, oak, or sumac: You can have a rash for 21 days or longer before it goes away.
  • #2 Poison Ivy, Oak, and Sumac Skin Rashes: Symptoms and Treatments | BENADRYL®
    https://www.benadryl.com/itchy-skin/poison-ivy-oak-sumac-rashes-symptoms-relief
    The rash usually clears within 1-3 weeks and it can be extremely itchy until it clears. The amount of time it takes to clear depends on whether you have had a rash before from poison ivy, oak, or sumac. […] If you have had a rash before from poison ivy, oak, or sumac, the rash tends to last 1-14 days. […] If you have never had a rash before from poison ivy, oak, or sumac, the rash can take longer, up to 21 days to clear. […] Rashes from poison ivy, oak, and sumac share similarities with rashes from other causes, such as bug bites and shingles. […] A poison ivy, sumac, or oak rash can look like it is spreading to other parts of the body, but you are actually developing new rashes in areas of the skin that came into contact with urushiol, the oil these plants produce that can induce the itching and rash.
  • #2 Poison Ivy Rash, Poison Oak, Poison Sumac: Symptoms, Causes & Treatment
    https://my.clevelandclinic.org/health/diseases/10655-poison-plants-poison-ivy–poison-oak–poison-sumac
    The extent of the rash depends on your skin sensitivity and how much oil you touched. […] Poison ivy rashes cause mild (but annoying) symptoms that go away within a week or two. […] Rarely, a skin rash can last for longer than a month. […] Poison oak and poison sumac rashes should go away within one to two weeks.
  • #2 Having a Poison Ivy Reaction | DCSI Florida DermatologyHaving a Poison Ivy Reaction | DCSI Florida Dermatology
    https://www.mydcsi.com/conditions/skin/inflammatory-skin/poison-ivy-reaction/
    Approximately 85% of people are allergic to urushiol and will develop a rash upon contact. However, about 15% of people are naturally resistant to urushiol and may not experience any reaction, including the typical rash or other symptoms of contact dermatitis, even after exposure. […] Sensitivity can also change over time, and someone who did not react in the past may develop a sensitivity later in life. Even if someone does not react initially, they can become sensitized over time, leading to an allergic reaction upon future exposures.
  • #2 Poison Ivy vs. Poison Oak Rash Symptoms and Treatment
    https://www.verywellhealth.com/poison-ivy-vs-poison-oak-7093054
    Poison ivy and poison oak rashes are both caused by the urushiol oil that the plants produce. When the oil gets on your skin, it can cause a rash if you are sensitive to it. The severity of the symptoms differs from person to person, but you can usually treat the condition at home with over-the-counter medications. In severe cases, you may need to see a healthcare provider. […] The stages of this rash include: The skin itches. A red rash occurs, sometimes with swelling. Blisters appear with a clear liquid inside. Healing: Eventually, the blisters break, weep, or ooze, and become crusty. […] Sometimes, people may have a rash with black spots or black streaks. This is known as black-spot poison-ivy dermatitis. […] The rash does not spread on your skin. After you’ve been exposed to poison ivy or oak, the rash may take different amounts of time to appear on different areas of your body. This can make you think that the rash is spreading or getting worse.
  • #2 10 Things to Know About Poison Ivy Rash
    https://mydoctor.kaiserpermanente.org/mas/news/10-things-to-know-about-poison-ivy-rash-2184009
    More serious symptoms may cause difficulty breathing or facial swelling. In these cases, seek medical attention immediately. […] Scratching a poison ivy rash can worsen the situation. Scratching the rash and blisters may lead to a bacterial infection. Fever may be a sign that a secondary bacterial infection has developed.
  • #2 What to Do About Poison Ivy (for Parents) | Nemours KidsHealth
    https://kidshealth.org/en/parents/poison-ivy-sheet.html
    Get Emergency Medical Care for Poison Ivy if Your Child: has a known severe allergy to poison ivy, poison oak, or poison sumac, has swelling of the tongue or throat, complains of chest tightness or trouble breathing, develops large areas of redness or swelling, was given a shot of epinephrine (EpiPen).
  • #2 Having a Poison Ivy Reaction | DCSI Florida DermatologyHaving a Poison Ivy Reaction | DCSI Florida Dermatology
    https://www.mydcsi.com/conditions/skin/inflammatory-skin/poison-ivy-reaction/
    If a person has a bad reaction to poison ivy, they may experience severe symptoms beyond the typical rash and itching. These symptoms can include widespread blistering, significant swelling, and intense itching. The rash can sometimes become infected, leading to complications such as cellulitis, which requires antibiotic treatment. […] A systemic poison ivy reaction occurs when the urushiol oil from poison ivy is absorbed into the bloodstream, causing an allergic reaction throughout the body rather than just at the site of contact. This type of reaction can cause widespread rashes, swelling, and other symptoms beyond the area of exposure. In severe cases, it can lead to symptoms such as difficulty breathing, fever, and swelling of the face or throat, which require immediate medical attention.
  • #2 Poison Ivy, Oak, and Sumac Skin Rashes: Symptoms and Treatments | BENADRYL®
    https://www.benadryl.com/itchy-skin/poison-ivy-oak-sumac-rashes-symptoms-relief
    The following are less common severe symptoms that you can have with a poison ivy, oak, or sumac rash. […] If you experience any of the following symptoms with a poison ivy, oak, or sumac rash, reach out to a doctor or healthcare provider. […] Usually, symptoms improve and the rash clears on its own within 7-10 days. Reach out to your healthcare provider if you have severe symptoms or your symptoms do not improve.
  • #2 Poison Ivy, Oak, or Sumac Information & Treatment
    https://www.columbiadoctors.org/health-library/condition/poison-ivy-oak-or-sumac/
    Poison ivy, oak, and sumac are plants that can cause a red, itchy rash called allergic contact dermatitis. It is the most common skin problem caused by contact with plants. […] The usual symptoms are: Itching. Red streaks or general redness where the plant touched the skin. Small bumps or larger raised areas (hives). Blisters that may leak fluid. […] In people who are very allergic to the oil, even a little may cause serious symptoms that need medical attention right away, such as: Trouble breathing. Swelling of the face, mouth, neck, or genitals. The eyelids may swell shut. Widespread, large blisters that ooze a lot of fluid. […] The rash usually takes more than a week to show up the first time you have a reaction to the oil. It develops in a day or two on later contacts. The rash may form in new areas over several days, but you will only get a rash where the oil touched your skin. […] The rash usually lasts about 10 days to 3 weeks. But it may last up to 6 weeks in more severe cases.
  • #2 Poison Ivy | Boston Children’s Hospital
    https://www.childrenshospital.org/conditions/poison-ivy
    Poison ivy, poison oak, and poison sumac are three native plants collectively called poison ivy whose oils can cause an allergic reaction in nearly 85 percent of the population. The reaction is characterized by a skin rash, followed by bumps and blisters that itch. […] The reaction is usually contact dermatitis, which may occur several hours, days, or even weeks after exposure. The dermatitis is characterized by a rash followed by bumps and blisters that itch. Sometimes, swelling occurs in the area of contact. Eventually, the blisters break, ooze, and crust over. […] If the poison ivy blisters and rash are on the face, near the genitals, or all over the body, your child’s physician should be notified. After a medical history and physical examination, your child’s doctor may prescribe a steroid cream, oral steroids, or steroid injections to help with the swelling and itching.
  • #2 Poison Ivy, Oak, and Sumac Rash | Cedars-Sinai
    https://www.cedars-sinai.org/health-library/diseases-and-conditions/p/poison-ivy-oak-and-sumac-rash.html
    Poison ivy, oak, and sumac rash is caused by the body’s reaction to an oil in the plants called urushiol. […] The symptoms most often include a red, bumpy, itchy rash with fluid-filled blisters. The blisters break open, ooze fluid, and then crust over. The area of skin may also be swollen. Swelling can mean the allergic reaction is more severe. […] The rash doesn’t show up right away. But you can spread the oils around your body without knowing it. […] The rash can’t be spread from person to person by touching the blisters, or from the fluid inside the blisters. But oil that remains on skin, clothes, or shoes can be spread to another person and cause a rash.
  • #2 Poison Ivy Rash: Pictures, Symptoms, and Treatment
    https://www.healthline.com/health/outdoor-health/poison-ivy-pictures-remedies
    About 85 percent of Americans are allergic to poison ivy. These people will experience mild, but irritating, symptoms, such as a red rash, itching, and swelling. Of those who are allergic, about 10 to 15 percent will have a severe reaction. They may develop fluid-filled blisters that become infected. […] A severe poison ivy allergy causes: severe swelling, difficulty breathing, blisters that become inflamed and infected. […] A poison ivy rash is bothersome. The itching and swelling can be irritating. Rarely, a poison ivy rash can be serious or fatal. When this happens, its often the result of complications caused by the reaction. […] Complications of a poison ivy rash include: A bacterial infection is a common complication of a poison ivy rash. Repeated scratching can cause microscopic breaks in the skin. Bacteria can make their way into the breaks, and an infection can develop. […] If you begin experiencing breathing or swallowing difficulties after coming into contact with poison ivy, seek treatment right away. This is an emergency situation that could become deadly without proper treatment.