Morton's neuroma: when the scan finds a nerve, but not the reason it hurts.

Thickened nerves between the toes are common in people with no pain at all, which is why confirming the neuroma matters so much.

This page is about understanding the condition and the role the brain and nervous system can play in it. It is not a diagnosis. Your own clinicians know your case.

What Morton's neuroma is

Morton's neuroma is not a true tumour despite the name. It is a thickening of the tissue around a small nerve that runs between the long bones of the foot, usually between the third and fourth toes and sometimes between the second and third. It is thought to develop from repeated pressure or irritation, which is why it is linked to tight shoes, high heels and activities that load the forefoot.

The classic symptoms are burning, tingling or sharp pain in the ball of the foot that spreads into the toes, numbness, and the feeling of standing on a marble or a bunched-up sock. Pain is typically worse in narrow shoes and better barefoot. A clinician diagnoses it mainly by history and examination, including squeezing the forefoot to reproduce the pain or feel a click. Ultrasound or MRI can support the diagnosis. Treatment ranges from wider shoes and pads to injections and surgery to remove the nerve.

The neuroplastic contribution

Neuroplastic symptoms are real symptoms, including pain, produced by learned pathways in the brain and nervous system rather than by ongoing damage in the tissues. The nervous system has become a sensitised alarm. Pain of this kind is not imaginary and not 'all in your head', and because the brain can change, it is reversible.

The ATNS Index of Neuroplastic Symptoms does not say Morton's neuroma is neuroplastic. It says a neuroma can usually be confirmed by careful history and examination, and that if it cannot be confirmed, assessment for neuroplastic symptoms should be part of a complete evaluation, because foot pain has many causes. In practice there are several ways the nervous system becomes the main driver:

• Thickened interdigital nerves are a frequent finding on scans of people who have no foot pain. A nerve seen on ultrasound does not prove it is the source of your pain.
• Pain that persists after the nerve has been injected, or even surgically removed, cannot be coming from that nerve. It is coming from a sensitised pain system.
• Fear of walking, guarding the foot and constant checking keep the brain's alarm set high, so every step is interpreted as damage.
• Pain that spreads to the whole foot, the other foot or elsewhere, or that comes with fatigue, sleep problems and other unexplained symptoms, fits a wider sensitised pattern.

Foot pain also gets many other labels, such as metatarsalgia, plantar fasciitis and foot neuropathy. When none of them fully fits and treatment does not work as expected, the nervous system deserves a look. Our central sensitization explainer describes how.

What the research shows

A sonographic study of both feet in people with Morton's neuroma examined how often neuromas are found bilaterally and symmetrically, and highlighted that earlier work in asymptomatic volunteers reported a high prevalence of interdigital nerve enlargements. The authors warn about incidental findings and overdiagnosis: the nerve on the scan is not necessarily the cause of the pain. A systematic review of forefoot imaging found four studies that looked for neuromas in people with no foot pain, and they reported neuroma-like findings in roughly 25 to 53 percent of those pain-free feet.

A study of MRI and ultrasound in Morton's neuroma found that imaging accuracy depended on lesion size, that ultrasound was unreliable for small lesions, and that even using both scans together did not match the predictive value of a careful clinical assessment. A systematic review of the diagnostic accuracy of symptoms and physical examination tests reached a similar place: clinical findings remain the backbone of diagnosis, with imaging used to confirm or resolve uncertain cases.

None of these studies tests a neuroplastic model of forefoot pain directly. What they establish is the ATNS index's starting point: a neuroma should be confirmed clinically, scans can mislead, and when the neuroma cannot be confirmed the pain still needs an explanation. Central sensitization, well documented in chronic musculoskeletal pain generally, is the leading candidate.

Signs the brain may be part of the picture

• Examination does not clearly reproduce the pain, or the scan finding is small, bilateral or in a different space from where it hurts.
• Pain continues after an injection that should have numbed the nerve, or after surgery to remove it.
• Pain has spread beyond the original spot, to the whole foot, both feet or up the leg.
• It flares with stress, poor sleep or worry, and eases when you are absorbed in something.
• You have other unexplained symptoms such as back pain, headaches, IBS or fatigue.
• You have begun avoiding walking or standing out of fear, not just discomfort.

A solution that addresses it

There is an approach that addresses the brain's contribution. It is often called pain and symptom reprocessing. It includes education about neuroplastic symptoms, somatic tracking (observing foot pain with curiosity and safety rather than fear), reducing threat around walking, a graded return to activity, emotional awareness and expression, and acceptance and commitment skills. It is delivered by trained clinicians and increasingly through digital programs, and it works alongside sensible footwear and podiatry care.

Cindra is a daily AI companion built around these approaches, with daily check-ins, short practices and plain-language lessons for people whose symptoms have a neuroplastic component. If your forefoot pain has outlasted the treatments, you can join the waitlist.

What to do next

Get a careful clinical examination from a doctor or podiatrist, and ask directly whether the neuroma has been confirmed or only suspected. Seek prompt attention for a foot that is hot, red and swollen, for numbness that is spreading, for pain after a definite injury, or for foot problems if you have diabetes or poor circulation.

If the neuroma cannot be confirmed, or treatment has not worked as expected, ask whether your pain fits a neuroplastic pattern. If it might, start learning and practising. The hurt versus harm page and the pacing guide are good next reads.

This article is for general education and is not medical advice, and it does not diagnose or treat any condition. Persistent symptoms deserve a proper medical assessment to rule out disease or injury before a neuroplastic explanation is considered. If your symptoms are new, changing, or come with red-flag signs such as fever, unexplained weight loss, numbness or weakness, chest pain, or loss of bladder or bowel control, see a clinician promptly.