On the plantar surface of the foot inferior to the intermetatarsal ligament a nerve junction is present. This nerve junction is thicker than the other digital nerves and as it passes under the ligament can be subject to rubbing and traction by the overlying ligament. Too much trauma to the nerve causes it to become even thicker and inflamed. The symptoms of numbness, tingling, and electric shock frequently follow. Although this condition is not dangerous, it is frequently troublesome to the patient and can interfere with walking.
Treatments include steroid injections, alcohol injections to numb the nerve, and surgery to decompress the nerve. Recurrence is possible with all three treatments.
Frequently pressure exerted by the metatarsals and pain below these metatarsals is misdiagnosed as Morton’s Neuroma. Care must be exercised when metatarsals are prominent.