A neuroma is an enlargement of nerve tissue caused by irritation or compression. In the foot, this commonly occurs between the third and fourth toes and is known as Morton’s neuroma. This nerve is naturally larger than others in the foot, making it more prone to irritation.
Morton’s neuroma often develops due to repeated pressure or trauma. Factors that contribute include high-impact activities, flat feet, thinning of the fat pad under the foot, hammertoes, bunions, and tight or narrow shoes. Persistent irritation causes the nerve to thicken, forming scar tissue and leading to pain.
Patients may feel as if there is a pebble or lump in their shoe, along with numbness, tingling, burning, or sharp pain in the ball of the foot. Symptoms often improve when shoes are removed or the foot is massaged. Your foot specialist will evaluate your symptoms, perform a physical exam, and may order imaging tests like X-rays to rule out other causes and confirm the diagnosis.
