Neuroma mortona
Etiologia i przyczyny

Neuroma Mortona to łagodny rozrost tkanki nerwowej, najczęściej lokalizujący się między trzecim a czwartym palcem stopy, będący wynikiem przewlekłego ucisku i drażnienia nerwu międzypalcowego w obrębie więzadła poprzecznego śródstopia. Patofizjologia obejmuje hiperplazję nerwu, demielinizację, zwłóknienie śródnerwowe oraz zmiany naczyniowe, co wskazuje na przewlekły stan zapalny i uszkodzenie nerwu. Etiologia jest wieloczynnikowa, z dominującą teorią przewlekłego urazu mechanicznego, uwięźnięcia nerwu między głowami kości śródstopia oraz niedokrwienia. Predyspozycje anatomiczne, takie jak wąskie przestrzenie między kośćmi śródstopia, grubszy nerw w trzeciej przestrzeni międzypalcowej oraz deformacje stopy (płaskostopie, stopa wydrążona, paluchy koślawe, palce młotkowate) zwiększają ryzyko rozwoju schorzenia. Czynniki zewnętrzne, w tym noszenie obuwia na wysokim obcasie i z wąskimi noskami, a także aktywności fizyczne generujące powtarzalne mikrourazy (bieganie, balet, narciarstwo), są istotnymi elementami patogenezy.

  1. Etiologia neuroma Mortona
    1. Niepewność co do dokładnej przyczyny
    2. Główne teorie etiologiczne
  2. Czynniki anatomiczne
    1. Nieprawidłowości strukturalne stopy
  3. Czynniki mechaniczne i biomechaniczne
    1. Obuwie jako czynnik ryzyka
    2. Aktywność fizyczna i sport
    3. Nieprawidłowa biomechanika stopy
  4. Inne czynniki ryzyka
    1. Płeć i wiek
    2. Urazy i stany zapalne
    3. Czynniki zawodowe i styl życia
  5. Konsekwencje nieleczonego neuroma Mortona
  6. Podsumowanie przyczyn neuroma Mortona
    1. Kolejne rozdziały

Etiologia neuroma Mortona

Neuroma Mortona (ang. Morton’s neuroma) to łagodny rozrost tkanki nerwowej występujący najczęściej między trzecim a czwartym palcem stopy. Jest to schorzenie, które charakteryzuje się pogrubieniem nerwu międzypalcowego w wyniku jego ucisku i przewlekłego drażnienia w okolicy podeszwowej więzadła poprzecznego śródstopia. Mimo nazwy „neuroma” (nerwiak), nie jest to prawdziwy guz nowotworowy, lecz raczej włókniak okołonerwowy (perineural fibroma) – rozrost tkanki włóknistej wokół tkanki nerwowej12.

Niepewność co do dokładnej przyczyny

Dokładna przyczyna neuroma Mortona nie jest w pełni poznana. Istnieje kilka wiodących teorii na temat etiologii tego schorzenia12. Specjaliści nie zawsze są pewni, co powoduje stan zapalny nerwu, jednak uważa się, że główną przyczyną jest ucisk na palce, nerwy między nimi oraz przednią część śródstopia1. Badania histopatologiczne wykazują hiperplazję w obrębie nerwu, demielinizację, zwłóknienie śródnerwowe i pogrubienie naczyń włosowatych śródnerwia, co wskazuje na przewlekłe podrażnienie i uszkodzenie1.

Główne teorie etiologiczne

Istnieją cztery główne hipotezy dotyczące przyczyn powstawania neuroma Mortona1:

  1. Teoria przewlekłego urazu – najszerzej akceptowana hipoteza, zakładająca, że mechaniczne efekty chodzenia powodują przewlekłe mikrourazy śródstopnych nerwów podeszwowych, które zostają uciśnięte między dwiema głowami kości śródstopia i stawami śródstopno-paliczkowymi1.
  2. Teoria uwięźnięcia – jedna z najwcześniej proponowanych teorii, mówiąca, że nerwiaki międzypalcowe powstają w wyniku ucisku nerwu międzypalcowego o przedni koniec głębokiego więzadła poprzecznego śródstopia i struktur tkanek miękkich podeszwy1.
  3. Teoria zapalenia kaletki międzyśródstopnej – zakładająca, że zapalenie kaletki w okolicy międzyśródstopnej powoduje ucisk i stan zapalny z następczym zwłóknieniem dotkniętego wspólnego nerwu podeszwowego palca1.
  4. Teoria niedokrwienna – oparta na histopatologicznych wynikach badań tętnicy podeszwowej wspólnej, wykazujących zmiany zwyrodnieniowe przed włóknistym pogrubieniem nerwu1.

Wiele danych wskazuje, że neuroma Mortona jest wynikiem połączenia przewlekłego urazu o niskim stopniu nasilenia oraz klasycznej neuropatii z uwięźnięcia niedokrwiennego wspólnego nerwu podeszwowego palca w miejscu jego rozwidlenia1. Teoria entrapment (uwięźnięcia) wskazuje, że neuroma Mortona jest neuropatią z uwięźnięcia dotkniętego wspólnego nerwu podeszwowego palca między sąsiadującymi głowami kości śródstopia lub przez więzadło poprzeczne śródstopia1.

Czynniki anatomiczne

Szczególna anatomia stopy predysponuje do rozwoju neuroma Mortona1. Badania wykazały, że osoby, których kości śródstopia są położone blisko siebie, są bardziej narażone na rozwój neuroma Mortona1. W tych przypadkach neuralgiczny ból może być bardziej oporny na leczenie zachowawcze, takie jak zastosowanie wkładek ortopedycznych1.

Anatomia kości stopy także przyczynia się do rozwoju neuroma Mortona. Przestrzeń między kośćmi śródstopia jest węższa między drugą a trzecią oraz między trzecią a czwartą kością śródstopia. Oznacza to, że nerwy biegnące między tymi kośćmi są bardziej narażone na ucisk i podrażnienie1.

Zjawiskiem anatomicznym, które może zwiększać podatność na neuroma Mortona, jest grubszy nerw utworzony przez połączenie gałęzi nerwów podeszwowych przyśrodkowego i bocznego, szczególnie w trzeciej przestrzeni międzypalcowej. Ta anatomiczna odmiana skutkuje grubszym nerwem, który jest bardziej podatny na uraz między ograniczającymi głowami kości śródstopia, co często wymienia się jako przyczynę przewagi występowania neuroma Mortona specyficznie w trzeciej przestrzeni międzypalcowej1.

Niektóre osoby mają naturalnie cieńszą warstwę tkanki tłuszczowej pod stopami, co zwiększa podatność na rozwój neuroma Mortona. U innych poduszeczka tłuszczowa mogła zanikać z powodu wielokrotnych iniekcji steroidów1.

Nieprawidłowości strukturalne stopy

Neuroma Mortona często występuje u osób z określonymi deformacjami stopy12. Do tych nieprawidłowości strukturalnych należą:

  • Stopa płaska (płaskostopie) – u osoby, która ma płaskostopie (pronuje stopę), dochodzi również do ucisku nerwu. Gdy łuk stopy zapada się, stopa nie opada po prostu prosto w dół. Jest to ruch trójwymiarowy, taki że występuje rotacja zewnętrzna i przechylanie stawów w tylnej części stopy i kostki, co powoduje ucisk zewnętrznej części stopy o obuwie1.
  • Wysokie łuki stopy (stopa wydrążona) – zwiększają nacisk na przednią część stopy1.
  • Paluchy koślawe (halluks) – deformacja, która może zmieniać mechanikę stopy i zwiększać nacisk na nerwy międzypalcowe1.
  • Palce młotkowate (palce szponiaste) – powodują zaburzenie prawidłowej biomechaniki stopy1.
  • Metatarsus primus brevis – ten typ stopy charakteryzuje się pierwszą kością śródstopia, która jest krótsza od pozostałych. W rezultacie druga, trzecia i czwarta kość śródstopia przyjmują większy nacisk, co prowadzi do przeciążenia, śródstopnego ścięcia i często do powstania nerwiaka1.
  • Niestabilność pierwszej kości śródstopia – może wynikać z nieprawidłowej pronacji (gdy łuk stopy zapada się a staw skokowy zapada się nadmiernie podczas chodzenia lub biegania), palucha koślawego, sztywności stawu palucha lub nadmiernej ruchomości stopy1.

Czynniki mechaniczne i biomechaniczne

Neuroma Mortona często rozwija się w wyniku nieprawidłowego obciążenia biomechanicznego stopy1. Nadmierny nacisk na nerw w stopie prowadzi do jego pogrubienia i rozwoju stanu zapalnego1.

Obuwie jako czynnik ryzyka

Jednym z najczęstszych czynników przyczyniających się do rozwoju neuroma Mortona jest noszenie nieodpowiedniego obuwia1:

  • Buty na wysokim obcasie – powodują zwiększony nacisk na przednią część stopy, zmuszając palce do wejścia w wąską część buta. Neuroma Mortona jest 8-10 razy częstsza u kobiet niż u mężczyzn ze względu na noszenie butów na wysokim obcasie1.
  • Obuwie z wąskimi noskami – ściska palce razem, co zwiększa ucisk na nerwy1.
  • Zbyt ciasne buty – ograniczają przestrzeń dla palców i zwiększają ucisk na nerwy podeszwowe1.

Wybór obuwia jest jednym z największych czynników ryzyka rozwoju nerwiaka. Buty, które są zbyt wąskie w części palcowej, ściskają palce i odpowiadające im nerwy. To ściskanie podrażnia nerw, powodując jego obrzęk i ostatecznie rozrost dodatkowej tkanki1.

Aktywność fizyczna i sport

Niektóre aktywności fizyczne zwiększają ryzyko rozwoju neuroma Mortona12:

  • Bieganie i inne sporty o wysokim uderzeniu na przednią część stopy powodują powtarzalne mikrourazy1.
  • Sporty wymagające ciasnego obuwia, takie jak narciarstwo lub wspinaczka1.
  • Sporty wymagające gwałtownych skrętów i wywierające siły boczne na stopę w obuwiu, np. tenis1.
  • Balet – pozycja demi-pointe zwiększa nadmierne zgięcie grzbietowe palców1.

Według badań, aktywności takie jak regularne bieganie, taniec baletowy, narciarstwo, służba wojskowa oraz sport zawodowy zwiększają ryzyko rozwoju neuroma Mortona1.

Nieprawidłowa biomechanika stopy

Teoria biomechaniczna przyczyn neuroma Mortona obejmuje mechanikę stopy i stawu skokowego. Na przykład, osoby z napięciem mięśni brzuchatego łydki i mięśnia płaszczkowatego lub które nadmiernie pronują stopę, mogą kompensować to poprzez zgięcie grzbietowe kości śródstopia, co w następstwie podrażnia nerw międzypalcowy1.

Abnormalna pronacja występuje, gdy łuk stopy pozostaje płaski zbyt długo, a staw skokowy zapada się do pozycji zwanej ewersją. Nieprawidłowa pronacja, która powoduje niestabilność przedstopia, wraz z nadmiernym ruchem kości śródstopia może wywoływać naprężenie ścinające na nerwie i prowadzić do powstania nerwiaka1.

Osoby z napiętymi mięśniami łydki, które ograniczają ruch stawu skokowego, mogą doświadczać zwiększonego obciążenia przedniej części stopy, co sprzyja rozwojowi neuroma Mortona1.

Inne czynniki ryzyka

Płeć i wiek

Neuroma Mortona dotyka częściej kobiety niż mężczyzn1. Dane kliniczne pokazują, że to schorzenie jest wyraźnie częstsze u kobiet ze względu na różnice anatomiczne (układ i architektura stopy) oraz czynniki fizjologiczne (takie jak wybór butów na wysokim obcasie, styl życia i nawyki)1.

Szacuje się, że nawet 3 na 4 kobiety rozwijają neuroma Mortona, która może, ale nie musi powodować bólu lub dyskomfortu1. Według innego badania, badacze doszli do wniosku, że neuroma Mortona występuje 16 razy częściej u kobiet w porównaniu do mężczyzn1.

Neuroma Mortona najczęściej dotyka osoby w wieku od 40 do 60 lat1. Osoby powyżej 40 roku życia mają zmniejszone poduszeczki tłuszczowe amortyzujące w przedniej części stopy, które ulegają degeneracji i kompresji wraz z upływem czasu1.

Urazy i stany zapalne

Neuroma Mortona może być również spowodowana urazem stopy1. Może to być spowodowane upadkiem z wysokości, czymś, co spadło na stopę, lub nieprawidłowym ruchem skrętnym. Może to być również spowodowane powtarzającym się urazem, takim jak trening maratoński1.

Czasami inne problemy mogą przyczynić się do ucisku nerwu. Należą do nich rozrost tłustego guza (zwanego tłuszczakiem) i tworzenie się wypełnionego płynem woreczka, który może tworzyć się wokół stawu (kaletka)1.

Także zapalenie stawów w stopie obok jednego z nerwów palców może czasami powodować podrażnienie nerwu i prowadzić do objawów neuroma Mortona1. Schorzenie to często jest związane z zapaleniem małych woreczków wypełnionych płynem (zapalenie kaletki), które są obecne w stopie i działają jako poduszki1.

Czynniki zawodowe i styl życia

Czynniki zawodowe i styl życia mogą również przyczyniać się do rozwoju neuroma Mortona1:

  • Praca wymagająca długotrwałego stania lub chodzenia, zwłaszcza na twardych powierzchniach1.
  • Zawody wymagające częstego kucania na palcach, takie jak cieśla i niektóre rodzaje prac budowlanych1.
  • Nadwaga lub otyłość zwiększają obciążenie stóp1.
  • Noszenie niewspierającego obuwia, takiego jak buty lub sandały, które mają niski obcas1.

Konsekwencje nieleczonego neuroma Mortona

Jeśli neuroma Mortona nie jest leczona, może spowodować uszkodzenie nerwu lub przewlekły ból w dotkniętej stopie1. Jako że uciśnięty nerw powoduje zmniejszony przepływ krwi w naczyniach zaopatrujących nerw w krew (vasa nervorum), prowadzi to do miejscowego niedokrwienia, które zmniejsza zdolność aksonów nerwowych do przewodzenia. Gdy ucisk staje się bardziej dotkliwy w miarę upływu czasu, dochodzi do ogniskowej demielinizacji, a następnie uszkodzenia aksonu i ostatecznie do włóknienia bliznowatego w obrębie nerwu1.

W przypadku neuroma Mortona, uszkodzenie tkanki nerwowej może stać się trwałe, jeśli przyczyna stanu zapalnego i objawy nie są odpowiednio leczone1. Leczenie mające na celu zmniejszenie stanu zapalnego i obciążenia w przedstopiu może sprawić, że nerwiaki staną się bezobjawowe, tj. nie będą powodować bólu1.

Podsumowanie przyczyn neuroma Mortona

Neuroma Mortona to złożony problem medyczny, którego dokładna etiologia pozostaje przedmiotem badań. Najczęściej uznawane przyczyny to kombinacja czynników anatomicznych, biomechanicznych, urazowych i związanych ze stylem życia12.

  • Nieprawidłowości anatomiczne stopy (płaskostopie, wysokie łuki, paluchy koślawe, palce młotkowate)1
  • Noszenie niewłaściwego obuwia, szczególnie butów na wysokim obcasie i z wąskimi noskami1
  • Aktywności sportowe o wysokim uderzeniu na przednią część stopy1
  • Urazy stopy1
  • Zapalenie kaletki i inne stany zapalne stopy1
  • Nieprawidłowa biomechanika stopy, w tym nadmierna pronacja1
  • Czynniki zawodowe wymagające długotrwałego stania lub chodzenia1
  • Nadwaga i otyłość1

Zrozumienie przyczyn neuroma Mortona jest kluczowe dla skutecznej profilaktyki i leczenia. Odpowiednie obuwie, modyfikacja aktywności fizycznej oraz wczesna interwencja mogą pomóc zapobiegać rozwojowi tego bolesnego schorzenia i minimalizować jego wpływ na jakość życia pacjentów1.

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  1. 18.04.2026
  2. www.leksykon.com.pl

Materiały źródłowe

  • #1 Morton’s neuroma – Wikipedia
    https://en.wikipedia.org/wiki/Morton%27s_neuroma
    Morton’s neuroma is a benign neuroma of an intermetatarsal plantar nerve, most commonly of the second and third intermetatarsal spaces (between the second/third and third/fourth metatarsal heads; the first is of the big toe), which results in the entrapment of the affected nerve. […] Some sources claim that entrapment of the plantar nerve resulting from compression between the metatarsal heads, as originally proposed by Morton, is highly unlikely, because the plantar nerve is on the plantar side of the transverse metatarsal ligament and thus does not come into contact with the metatarsal heads. […] It is more likely that the transverse metatarsal ligament is the cause of the entrapment. […] Though the condition is labeled as a neuroma, many sources do not consider it a true tumor, but rather a perineural fibroma (fibrous tissue formation around nerve tissue).
  • #1 Morton Neuroma – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/sites/books/NBK470249/
    Morton neuroma is a compressive neuropathy of the interdigital nerve in the forefoot due to compression and constant irritation at the plantar aspect of the transverse intermetatarsal ligament. […] The exact etiological cause of Morton neuroma is not known, but four major hypotheses exist. […] The chronic trauma theory, the most widely accepted hypothesis, states that the mechanical effects of walking cause chronic micro-traumas to the intermetatarsal plantar digital nerves, which become compressed between two metatarsal heads and the metatarsophalangeal joints. […] The entrapment theory, one of the earliest proposed theories, states that interdigital neuromas occur due to compression of the interdigital nerve against the anterior end of the deep transverse metatarsal ligament and plantar soft tissue structures.
  • #1 Morton’s Neuroma: Causes, Symptoms & Treatment
    https://my.clevelandclinic.org/health/diseases/15118-mortons-neuroma
    Mortons neuromas form when a nerve between your toe bones is irritated and swells. […] Experts arent always certain what causes the inflammation, but they think pressure on your toes, the nerves between them and the ball of your foot is the most common cause. […] Certain activities may increase your risk of developing a Mortons neuroma, including wearing high heels or shoes with narrow, pointed toes. […] Certain health conditions that affect your feet might make you more likely to develop a Mortons neuroma, including flat feet, high arch feet, bunions, hammertoes, and foot injuries. […] If a Mortons neuroma isnt treated, it can cause nerve damage or chronic pain in your affected foot.
  • #1
    https://www.elsevier.com/resources/clinicalkey-ai/what-causes-mortons-neuroma-0cd9
    Morton’s neuroma is primarily caused by compression and irritation of the interdigital nerve, typically in the third intermetatarsal space. […] The condition is considered an entrapment neuropathy where the common digital plantar nerve is compressed between the metatarsal heads or by the transverse metatarsal ligament. […] Histological studies of Morton’s neuroma show hyperplasia within the nerve, demyelination, intraneural fibrosis, and thickened endoneurial capillaries, indicating chronic irritation and damage. […] Anatomical variations, such as a thicker nerve formed by the joining of branches from the medial and lateral plantar nerves, make the nerve more susceptible to compression and trauma, particularly in the third interspace. […] External factors like wearing narrow shoes or high heels can exacerbate the compression of the nerve, leading to the symptoms associated with Morton’s neuroma.
  • #1 Morton Neuroma – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/sites/books/NBK470249/
    The intermetatarsal bursa theory states that bursitis in the intermetatarsal region causes compression and inflammation with subsequent fibrosis of the affected common plantar digital nerve. […] The fourth theory is the ischemic theory, based on histopathological findings of the common plantar digital artery exhibiting degenerative changes prior to the fibrous thickening of the nerve. […] Common causes include narrow toe-box footwear, hyperextension of the toes in high-heeled shoes, deviation of the toes, inflammation of the intermetatarsal bursa, thickening of the transverse metatarsal ligament, forefoot trauma, high-impact sporting activities, metatarsophalangeal joint pathology, and lipoma.
  • #1 Scientific Discussion of Morton’s Neuroma
    https://www.mortonsneuroma.com/mortons-neuroma/metatarsalgia-science/
    The exact cause of Mortons Neuroma (also known as Mortons metatarsalgia, Mortons neuralgia, plantar neuroma and intermetatarsal neuroma) is unclear. We believe that Mortons neuroma is the result of a combination of a chronic low-grade compression trauma and a classic ischemic entrapment neuropathy of the common digital plantar nerve at its bifurcation point. Due to factors relating to gait and tight shoes, the common plantar digital nerve is repeatedly squeezed between the plantar aspect (the bottom) of the foot and the anterior distal edge of the transverse inter-metatarsal ligament. The result is a chronic irritation of the nerve and the subsequent development of a benign fibrotic neuroma within the nerve. […] However, some studies show that chronic repetitive low-grade trauma is also present and conclude that Mortons neuroma is due to a chronic mechanical overload of the entire webspace. These two are not mutually exclusive and we believe that Mortons neuroma is due to a combination of chronic mechanical trauma of the webspace and an entrapment neuropathy of the nerve.
  • #1
    https://www.elsevier.com/resources/clinicalkey-ai/what-causes-mortons-neuroma-0cd9
    While the exact etiology of Morton neuroma is uncertain, most histologic studies show evidence of hyperplasia within the nerve. […] The neuroma is further considered to be an entrapment neuropathy of the affected common digital plantar nerve between adjacent metatarsal heads or by the transverse metatarsal ligament. […] This anatomic variation results in a thicker nerve that is more prone to trauma between the constrictive metatarsal heads, a reason often cited to explain the prevalence of Morton neuroma specifically within the third interspace. […] The deep transverse intermetatarsal ligament may also be implicated in the cause of a neuroma. […] Soft tissue masses such as a plantar lipoma may also cause compression of the nerve against the ligament, leading to the formation of a neuroma.
  • #1
    https://mortonsneuroma.surgery/mortons-neuroma/causes/anatomical-causes/
    Some people have bone or nerve structures that are slightly different to those found in the typical human model. These features are often inherited and can cause a neuroma to form. […] Several studies have shown that people whose metatarsals are situated close together are more likely to develop Morton’s neuroma. In these cases, the neuroma may be more likely to recur after treatment. It may also be more resistant to conservative treatments like orthoses. […] Some people are more „bony” and lack natural padding under their feet. For others, the fat pad may have wasted away because of multiple steroid injections (which is why we discourage multiple injections). […] This foot type is characterised by a first metatarsal that is shorter than the others. The result is that the second, third and fourth metatarsals take more pressure, which leads to overload, metatarsal shear and, often, the formation of a neuroma. […] The nerve between the third and fourth toes may be anatomically thicker than the nerves between the other toes. This naturally-occurring thicker nerve may be at risk of developing a neuroma, especially if other risk factors, such as increased pronation, are present.
  • #1 Morton’s Neuroma: Causes, Symptoms, and Treatment
    https://patient.info/foot-care/heel-and-foot-pain-plantar-fasciitis/mortons-neuroma
    Morton’s neuroma is a condition that affects one of the nerves that run between the long bones (metatarsals) in the foot. The exact cause is not certain. […] The exact cause of Morton’s neuroma is not known. It is thought to develop as a result of long-standing (chronic) stress and irritation of a plantar digital nerve. […] The anatomy of the bones of the foot is also thought to contribute to the development of Morton’s neuroma. The space between the long bones (metatarsals) in the foot is narrower between the second and third and between the third and fourth metatarsals. This means that the nerves that run between these metatarsals are more likely to be compressed and irritated. […] Sometimes, other problems can contribute to the compression of the nerve. These include the growth of a fatty lump (called a lipoma) and also the formation of a fluid-filled sac that can form around a joint (a bursa). […] Also, inflammation in the joints in the foot next to one of the digital nerves can sometimes cause irritation of the nerve and lead to the symptoms of Morton’s neuroma.
  • #1 Neuroma causes – Neuroma Treatment Center of NYC
    https://neuromatreatmentcenternyc.com/all-about-neuromas/neuroma-causes/
    The exact cause of neuroma is controversial. There are many theories that are accepted. While doctors do not know exactly which one is correct, it is likely that it is a combination of many of them. Below are the most commonly accepted theories. […] A person who pronates, or has an arch that flattens out, will also put pressure on the nerve. When the arch collapses, the foot does not simply go straight down. It is a 3-dimensional motion such that there is external rotation and tilting of the joints at the back of the foot and ankle. This causes the outside of the foot to press against ones shoes. That can cause the metatarsal bones to irritate the nerve as well. In our practice, we find a high correlation between patients who pronate, or have flattened feet, with the presence of Mortons neuroma.
  • #1
    https://mortonsneuroma.surgery/mortons-neuroma/causes/biomechanical-causes/
    In order to manage Mortons neuroma, its important that we understand and treat the mechanical factors that lead to the condition. […] Morton’s neuroma also often develops because of abnormal biomechanical stress through the foot. This can lead to other conditions such as bursitis and arthritis. […] Examples of the many possible biomechanical causes of neuromas and interdigital nerve irritation include: […] There are many reasons why the first metatarsal can become unstable. These include abnormal pronation (where the foot arch drops and the ankle collapses excessively when walking or running), bunions, hallux limitus (a stiff big toe joint) and foot hypermobility (double-jointedness). […] Lesser toes (i.e. all toes other than the big toe) can retract due to various and often inherited causes, such as a foot with reduced upward ankle motion (ankle equinus).
  • #1 Morton’s neuroma – Overview | Guy’s and St Thomas’ NHS Foundation Trust
    https://www.guysandstthomas.nhs.uk/health-information/mortons-neuroma
    Morton’s neuroma is a thickening on the nerves between your toes. It is caused by compression or repeated irritation of the nerve. […] Sometimes this happens because joints and soft tissues change shape and compress the nerve. Over time, the body responds to this irritation by thickening the nerve to protect itself until it forms a lump, called a neuroma.
  • #1 What Triggers Morton’s Neuroma? – AOA Orthopedic Specialists
    https://www.arlingtonortho.com/what-triggers-mortons-neuroma/
    Morton’s neuroma is a condition that affects the nerves in the ball of the foot, most commonly between the third and fourth toes. It results in pain, burning, and numbness in the affected area. Understanding the triggers of Morton’s neuroma is essential for both prevention and early intervention. […] One of the most significant triggers for Morton’s neuroma is improper footwear. Wearing high heels or tight, narrow shoes can compress the toes and create pressure on the nerves. Over time, this pressure can lead to the development of Morton’s neuroma. […] Some individuals have inherited foot structures that make them more prone to developing Morton’s neuroma. High arches, flat feet, or unusual bone formations in the feet can increase the likelihood of nerve compression. […] Engaging in activities that place repeated stress on the forefoot, such as running or participating in sports that involve tight turns or rapid acceleration, can contribute to the development of Morton’s neuroma.
  • #1 Morton’s Neuroma: Causes & Treatments for Foot Nerve Pain
    https://www.emedicinehealth.com/mortons_neuroma/article_em.htm
    Morton’s neuroma frequently develops in response to irritation, trauma, or excessive pressure on the nerves in the forefoot. […] Causes of Morton’s neuroma include: Wearing shoes that are too tight in the toe area and compress the forefoot and toes […] Wearing high-heeled shoes that increase pressure on the forefoot and force the forefoot into a tight toe box. Morton’s neuroma is 8 to 10 times more common in women than in men due to wearing high-heeled shoes. […] Repetitive impact to the forefoot, such as from exercises like running, or court and racket sports […] Risk factors for developing Morton’s neuroma include having foot conditions such as: Bunions, Hammer toes, Flat feet, Highly flexible feet.
  • #1 Morton’s neuroma
    https://www.nhs.uk/conditions/mortons-neuroma/
    Morton’s neuroma is caused by an irritated or damaged nerve between the toe bones. […] It’s often linked to: […] wearing tight, pointy or high-heeled shoes […] doing a lot of running, or other sports or activities that place pressure on the feet […] having other foot problems such as flat feet, high arches, bunions or hammer toes.
  • #1 What is a Morton’s neuroma? | UCLA Health
    https://www.uclahealth.org/news/article/what-mortons-neuroma
    Experts arent sure exactly what causes Mortons neuromas, but certain things can put you at higher risk for developing one. […] Your choice of footwear is one of the biggest risk factors for developing a neuroma. Shoes that are too narrow in the toe box pinch the toes and the corresponding nerves. That squeezing irritates the nerve, causing it to swell and eventually build up extra tissue. […] High heels (which put more pressure on the balls of your feet) can also contribute to a Mortons neuroma. Activities that involve a lot of impact on the balls of your feet such as running or racquet sports can also irritate those nerves.
  • #1 Morton’s Neuroma: Causes, Treatment, and More
    https://www.healthline.com/health/mortons-neuroma
    Mortons neuroma is often caused by shoes that are too tight or that have high heels. These shoes can cause the nerves in your feet to become compressed or irritated. The irritated nerve thickens and gradually becomes more painful as a result of the pressure on it. […] Another possible cause is a foot or gait abnormality, which can lead to instability and can also put pressure on a nerve in your foot. […] Mortons neuroma is often associated with: flat feet, high arches, bunions, hammer toes. […] Its also associated with activities such as: repetitive sports activities, such as running or racquet sports, that increase pressure on the ball of the foot, sports that require tight shoes, such as skiing or ballet. […] Sometimes, a neuroma results from injury to the foot.
  • #1 Neuroma causes – Neuroma Treatment Center of NYC
    https://neuromatreatmentcenternyc.com/all-about-neuromas/neuroma-causes/
    Another theory for increased incidence of Mortons neuroma involves increased activities. Individuals who participate in high impact activities such as running, tennis, and skiing often have neuroma symptoms as well. Activities that cause one to make frequent turns and have lateral forces on the foot within the sneaker, cleat, or boot can increase the prevalence of Mortons neuroma. […] One of the theories for the cause of Mortons neuroma is the adjacent structures put pressure on the nerve and cause irritation. This causes the nerve to get enlarged and painful. This pressure is made worse when one wears tight shoes. In theory, this can cause a lateral force to push the two metatarsal bones closer together and into the nerve. In our practice, we see a high correlation with women who wear tight shoes or high heeled shoes with Mortons neuroma. […] Another theory is that trauma can cause Mortons neuroma. This can be due to a fall from a height, something falling on the foot, or an abnormal twisting motion. It can also be due to repetitive trauma such as marathon training.
  • #1 Physical Medicine and Rehabilitation for Morton Neuroma Clinical Presentation: History, Physical, Causes
    https://emedicine.medscape.com/article/308284-clinical
    Various factors have been implicated in the precipitation of Morton’s neuroma. […] Morton’s neuroma is known to develop as a result of chronic nerve stress and irritation, particularly with excessive toe dorsiflexion. […] Poorly fitting and constricting shoes (ie, small toe box) or shoes with heel lifts often contribute to Morton’s neuroma. Women who wear high-heeled shoes for a number of years or men who are required to wear constrictive shoe gear are at risk. […] A biomechanical theory of causation involves the mechanics of the foot and ankle. For instance, individuals with tight gastrocnemius-soleus muscles or who excessively pronate the foot may compensate by dorsiflexion of the metatarsals subsequently irritating of the interdigital nerve. […] Certain activities carry increased risk of excessive toe dorsiflexion, such as prolonged walking, running, squatting, and demi-pointe position in ballet.
  • #1 What Causes Morton’s Neuroma?
    https://www.mortonsneuroma.com/blog/what-causes-mortons-neuroma/
    It has been estimated that as many as 3 out of every 4 females develop Mortons neuroma that may or may not produce pain or discomfort. […] According to another study, investigators concluded that Mortons neuroma is 16-times more common in females as compared to males. […] Besides above listed risk factors, wrong choice of shoes (ill-fitting, narrow, worn-out shoes) can also aggravate your chances of developing this condition. […] Likewise, any lifestyle or occupational activity that increases the pressure or tension in the region of the forefoot can also increase your chances of developing Mortons neuroma. […] Certain sports or activities have a higher likelihood of developing Mortons neuroma include: Running regularly, Ballet dancing, Skiing, Military personnel, Professional athletes.
  • #1
    https://mortonsneuroma.surgery/mortons-neuroma/causes/biomechanical-causes/
    Various abnormalities elsewhere in the body can cause excessive stress on the forefoot, resulting in a neuroma. […] Abnormal pronation occurs when the foot arch remains flat for too long and the ankle collapses into a position, known as eversion. […] Abnormal pronation, which causes the forefoot to become unstable, together with excessive metatarsal movement can provoke a shearing stress on the nerve and lead to the formation of a neuroma.
  • #1 Morton’s Neuroma: Treatment, Symptoms & Causes – The Foot Hub
    https://thefoothub.com.au/mortons-neuroma/
    Morton’s neuroma is a painful condition that involves the thickening of a nerve in between the metatarsal bones in the balls of the feet. […] The exact cause of Morton’s neuroma is still unknown, but the following factors are linked to its development: […] Biomechanical factors: Foot posture such as flat feet or high arches can cause excess loading on the toe joints and thus lead to repeated stress on the nerve. […] Tight calf muscles: Limited ankle movement can cause increased loading on the balls of the feet. […] Footwear: Narrow/tight fitting shoes with high heels can compress the nerves and increase pressure on the balls of the feet. […] Trauma: Physical injury from falling or a blow can contribute to Morton’s neuroma. […] Repeated stress: Exercise or occupations that cause increased pressure on the front of the foot can also lead to the development of Morton’s neuroma.
  • #1 Morton neuroma – UF Health
    https://ufhealth.org/conditions-and-treatments/morton-neuroma
    Morton neuroma is an injury to the nerve between the toes that causes thickening and pain. It commonly affects the nerve that travels between the 3rd and 4th toes. […] The exact cause is unknown. Health care providers believe the following may play a role in the development of this condition: Wearing tight shoes and high heels, Abnormal positioning of toes, Flat feet, Forefoot problems, including bunions and hammer toes, High foot arches. […] Morton neuroma is more common in women than in men.
  • #1 What Causes Morton’s Neuroma?
    https://www.mortonsneuroma.com/blog/what-causes-mortons-neuroma/
    The exact cause of Mortons neuroma is not known. Researchers believe that the persistent pain in the fore-foot is the result of thickening or damage to the interdigital nerve due to chronic physical stress or irritation in the ball of the foot (the planter region) between the metatarsal heads. […] The irritation can sometime cause fibrosis or swelling of the fibers or tissues in the vicinity of plantar nerve. The irritated fibers can develop a mass or swelling (resembling a benign growth; hence the term neuroma). […] Certain predisposing anatomical or environmental factors that may aggravate the risk of Mortons neuroma are: […] Female gender: Clinical data shows that Mortons neuroma is clearly more common in females due to distinct anatomical characteristics (alignment and foot architecture) and physiological factors (such as choice of high heeled shoes, lifestyle and habits etc.).
  • #1 Mortons Neuroma: Causes, Symptoms & Treatment – Foot Pain Explored
    https://www.foot-pain-explored.com/mortons-neuroma.html
    Morton’s neuroma is a condition where there is damage and swelling of the nerves that run between the toes. […] Morton’s neuroma foot typically develops in response to excessive pressure, friction, irritation or an injury to one of the foot nerves as it travels to the toes. […] There are a number of things that increase the risk of developing Morton’s neuroma: […] Sports that place high-impact on the balls of the feet, such as running or climbing may damage the nerves […] Any alterations to the normal shape of the foot such as flat foot arches, bunions or hammertoes can change the way the pressure goes through the feet and irritate the nerves at the base of the toes […] Wearing tight-fitting shoes, or high heels places increased pressure on the ball of the foot which can irritate the nerves leading to a Morton’s neuroma […] Morton’s neuroma is thought to be 4-15 times more common in women than men. This is thought to be due to footwear […] Morton’s neuroma typically affects people between the ages of 40-60.
  • #1 Morton’s Neuroma: Treatment, Symptoms & Causes | The Feet People Podiatry
    https://www.thefeetpeople.com.au/symptoms-we-treat/mortons-neuroma/
    Additionally, activities that involve repetitive and increased loads to the ball of your foot, such as running or court sports can cause irritation in these nerves. […] Considering the potential causes of Morton’s neuroma, there are certain factors that can increase your risk of developing the condition: People over the age of 40 as they have diminished shock absorbing fat pads in the ball of their foot that degenerate and compress over time. […] Women or people who wear high heels, especially if you wear or have worn high heels or tight fitting shoes. […] Jobs that require long periods of standing on your feet […] Forefoot bursitis can impinge and irritate the nerve […] If you have Hallux abducto-valgus (bunions of big toe joint) or Tailor’s bunion (bunion of little toe joint) […] Overloading and overuse with exercise training loads […] Walking and running patterns.
  • #1 What is a Morton’s neuroma? Causes & Treatment – Orthopaedics
    https://onewelbeck.com/news/what-is-a-morton-s-neuroma-causes-treatment/
    A Mortons neuroma is one cause of metatarsalgia, a condition that causes pain in the ball of the foot. This pain is due to inflammation and subsequent thickening of the tissue that surrounds one of the nerves leading to the toes. The inflammation may be caused by irritation, trauma or increased loading of the nerve underneath the bones of the ball of the foot. […] Neuromas are often associated with inflammation of small fluid filled sacs (bursitis) that are present in the foot and act as cushions. […] Tight shoes, high heels and pushing off the starting blocks when running can aggravate the symptoms. […] If there is any doubt about the diagnosis, further review by an orthopaedic surgeon specialising in foot and ankle surgery is recommended prior to treatment. […] Ultrasound is a useful diagnostic investigation that can confirm the presence of a neuroma; however, it may be that the neuroma is an incidental finding and may not be the underlying cause of the pain.
  • #1 Plantar Digital Neuroma (Morton’s Neuroma) | NHS Lanarkshire
    https://www.nhslanarkshire.scot.nhs.uk/services/podiatry/plantar-digital-neuroma/
    You may have contributing factors related to a Plantar Digital Neuroma (Mortons Neuroma): Illfitting footwear that is too narrow or has a thin sole i.e. high heeled shoe, Being overweight, Foot deformities such as hallux valgus (bunion), hammer toes, Inflammatory conditions i.e. rheumatoid arthritis, psoriatic arthritis etc., Previous foot trauma i.e. metatarsal fracture, nerve injury, Weakness in the muscles within your foot or leg, Tightness in the muscles up the backs of your legs may cause you to load more through your forefoot, Wearing unsupportive footwear such as shoes or sandals which have a low heel, Spending long periods standing, walking or running, especially with a sudden increase in these activities.
  • #1 What Triggers Morton’s Neuroma? – AOA Orthopedic Specialists
    https://www.arlingtonortho.com/what-triggers-mortons-neuroma/
    Morton’s neuroma is more common in women and typically affects individuals between the ages of 40 and 60. Hormonal changes, such as those associated with menopause, may play a role in its development. […] Certain medical conditions, such as bunions, hammertoes, and rheumatoid arthritis, can increase the likelihood of Morton’s neuroma. […] Jobs that require prolonged standing or walking on hard surfaces can contribute to Morton’s neuroma.
  • #1 Morton’s Neuroma | Gulf South Foot & Ankle
    https://www.gulfsouthfootandankle.com/conditions/mortons-neuroma
    Mortons Neuromas develop due to pressure on the nerve. […] Certain activities and shoes can cause a Mortons Neuroma to develop. […] Most notably, high heel shoes, especially pointy toe high heel shoes can cause a Mortons Neuroma to develop. […] Any activity that results in increased pressure on the ball of your foot can potentially cause a neuroma to develop. […] Occupations that require a lot of crouching on your toes such as carpenters and certain types of construction work. […] Certain sporting activities such as basketball and tennis that put a lot of pressure on the ball of the foot can also cause a Mortons Neuroma to develop. […] Any activity that transfers body weight into the ball of the foot can potentially cause a neuroma to develop.
  • #1 Morton’s Neuroma: Symptoms, Causes, Diagnosis, and Treatment
    https://www.webmd.com/women/mortons-neuroma
    Mortons neuroma is an inflammation of a nerve in your foot that results from the thickening of tissue in your toe. It’s often caused by high-heeled or tight-fitting shoes, or by physical activities that put lots of pressure on your feet. […] Things that can make Morton’s neuroma worse include: […] Wearing ill-fitting or high-heeled shoes […] Doing sports or other activities that put stress on your feet, such as jumping and running […] Foot injuries and problems like high arches, bunions, and hammertoes […] Carrying extra body weight.
  • #1 Scientific Discussion of Morton’s Neuroma
    https://www.mortonsneuroma.com/mortons-neuroma/metatarsalgia-science/
    The entrapment injury may also be affected by other factors. In up to 80% of patients, intermetatarsal neuroma may be associated with some other pathological findings of the forefoot such as hallux valgus (bunion), hammer-toe, or pes transversus (splay foot) where the transverse arch of the foot is lowered so that the heads of the metatarsal bones II IV stand lower. […] Furthermore, the compressed nerve causes reduced blood flow in the vessels supplying the nerve with blood (the vasa nervorum). This causes local ischaemia, which decreases the ability of the nerve axons to transmit. As the compression becomes more severe over time, focal demyelination occurs, followed by axonal damage and finally, fibrotic scarring within the nerve. […] The mucoid degeneration in the intermetatarsal space is indicative of a connective tissue response to chronic repetitive low-grade trauma such as the trauma that would result from a mechanical overload in the webspace due to a nerve entrapment.
  • #1 Morton’s Neuroma: Progressive Spine & Sports Medicine: Pain Medicine
    https://www.progressivespineandsports.com/blog/mortons-neuroma
    If youve never heard of Mortons neuroma, youre not alone. […] The thickening and enlarging of nerve tissue which occurs with a neuroma happens in response to increased compression and irritation of the nerve tissue itself. Some of the most common precipitating causes include excessive use of high heeled shoes or any other type of uncomfortable, tight, tapered-toe footwear; foot abnormalities including hammertoes, flat feet, or bunions; and a history of direct foot injury or repetitive injury (often seen with sports such as running). […] In the case of Mortons neuroma, the damage to the nerve tissue can become permanent if the cause of the inflammation and the symptoms are not properly addressed.
  • #1 What is a Morton’s neuroma? Causes & Treatment – Orthopaedics
    https://onewelbeck.com/news/what-is-a-morton-s-neuroma-causes-treatment/
    Treatments that reduce the inflammation and load in the forefoot can allow neuromas to become asymptomatic, i.e. cause no pain. […] Initial treatment should be non-operative and aim to reduce inflammation and the load across the foot. […] If conservative treatment fails, surgery can be considered. Surgical operations aim to remove the nerve and thus relieve the pain.
  • #2 Morton neuroma | Radiology Reference Article | Radiopaedia.org
    https://radiopaedia.org/articles/morton-neuroma-1?lang=us
    Morton neuromas, also known as interdigital or intermetatarsal neuromas, are focal areas of symptomatic perineural fibrosis around a common plantar digital nerve of the foot. The condition is thought to be due to chronic entrapment of the nerve by the intermetatarsal ligament. […] The term neuroma is a misnomer because the abnormality is non-neoplastic and does not represent a true neuroma. It may more correctly be known as Morton metatarsalgia. […] Morton neuromas occur at a distal common plantar nerve, just proximal to the division into the proper digital nerves. 10% of Morton neuromas are bilateral. […] Morton neuromas are characterized by neural degeneration with epineural and endoneurial vascular hyalinisation and perineural fibrosis around a plantar digital nerve.
  • #2 Neuroma causes – Neuroma Treatment Center of NYC
    https://neuromatreatmentcenternyc.com/all-about-neuromas/neuroma-causes/
    The exact cause of neuroma is controversial. There are many theories that are accepted. While doctors do not know exactly which one is correct, it is likely that it is a combination of many of them. Below are the most commonly accepted theories. […] A person who pronates, or has an arch that flattens out, will also put pressure on the nerve. When the arch collapses, the foot does not simply go straight down. It is a 3-dimensional motion such that there is external rotation and tilting of the joints at the back of the foot and ankle. This causes the outside of the foot to press against ones shoes. That can cause the metatarsal bones to irritate the nerve as well. In our practice, we find a high correlation between patients who pronate, or have flattened feet, with the presence of Mortons neuroma.
  • #2 Morton neuroma – UF Health
    https://ufhealth.org/conditions-and-treatments/morton-neuroma
    Morton neuroma is an injury to the nerve between the toes that causes thickening and pain. It commonly affects the nerve that travels between the 3rd and 4th toes. […] The exact cause is unknown. Health care providers believe the following may play a role in the development of this condition: Wearing tight shoes and high heels, Abnormal positioning of toes, Flat feet, Forefoot problems, including bunions and hammer toes, High foot arches. […] Morton neuroma is more common in women than in men.
  • #2 What Causes Morton’s Neuroma?
    https://www.mortonsneuroma.com/blog/what-causes-mortons-neuroma/
    It has been estimated that as many as 3 out of every 4 females develop Mortons neuroma that may or may not produce pain or discomfort. […] According to another study, investigators concluded that Mortons neuroma is 16-times more common in females as compared to males. […] Besides above listed risk factors, wrong choice of shoes (ill-fitting, narrow, worn-out shoes) can also aggravate your chances of developing this condition. […] Likewise, any lifestyle or occupational activity that increases the pressure or tension in the region of the forefoot can also increase your chances of developing Mortons neuroma. […] Certain sports or activities have a higher likelihood of developing Mortons neuroma include: Running regularly, Ballet dancing, Skiing, Military personnel, Professional athletes.
  • #2 Morton Neuroma – StatPearls – NCBI Bookshelf
    https://www.ncbi.nlm.nih.gov/sites/books/NBK470249/
    The intermetatarsal bursa theory states that bursitis in the intermetatarsal region causes compression and inflammation with subsequent fibrosis of the affected common plantar digital nerve. […] The fourth theory is the ischemic theory, based on histopathological findings of the common plantar digital artery exhibiting degenerative changes prior to the fibrous thickening of the nerve. […] Common causes include narrow toe-box footwear, hyperextension of the toes in high-heeled shoes, deviation of the toes, inflammation of the intermetatarsal bursa, thickening of the transverse metatarsal ligament, forefoot trauma, high-impact sporting activities, metatarsophalangeal joint pathology, and lipoma.

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