Definition and Diagnosis

A neuroma is a collection or tangle of regenerating nerve ends. It occurs when an injured nerve is disconnected (literally, or by scar tissue) from its other end. This tangle of nerve fibers forms a bulb at the end of the disconnected nerve, which is called a neuroma. It can be very painful and sensitive to touch, especially when caught in scar tissue near the skin. Tapping on a neuroma often causes tenderness or electrical shooting pains. Numbness or weakness may also be present, depending on which nerve was injured.

Large neuroma involving the ulnar nerve (asterisk)

Treatment Options

Some neuromas become less painful with time, although most that are near joints, or in the hands or feet, remain symptomatic until treated. Avoiding irritation to this tender area is important. Treatment may include pain medication and local nerve blocks. If nerve blocks work, then more permanent interventional techniques may be used. With surgery the damaged nerve can be repaired, or more commonly, buried deep into the arm or leg where it will not be irritated. This usually works, if not, other options include flap coverage and peripheral nerve stimulation.