Morton’s neuroma is an enlarged nerve that usually occurs in the third interspace, which is between the third and fourth toes. To understand Morton’s neuroma further, it may be helpful to look at the anatomy of the foot. Problems often develop in the third interspace because part of the lateral plantar nerve combines with part of the medial plantar nerve here. When the two nerves combine, they are typically larger in diameter than those going to the other toes. Also, the nerve lies in subcutaneous tissue, just above the fat pad of the foot, close to an artery and vein. Above the nerve is a structure called the deep transverse metatarsal ligament. This ligament is very strong, holds the metatarsal bones together, and creates the ceiling of the nerve compartment. With each step, the ground pushes up on the enlarged nerve and the deep transverse metatarsal ligament pushes down. This causes compression in a confined space.
Morton’s neuroma develops for several reasons. The primary reason is wearing narrow toe-box shoes, which compress the metatarsal heads. Certain anatomical factors also make nerve compression more likely with the narrow toe box shoes. In some people fibers, the medial and lateral plantar nerves converge close to the heads of the third and fourth metatarsals. This junction creates a larger nerve structure between the metatarsal heads making it more vulnerable to compression.
A Morton’s neuroma usually causes burning pain, numbness or tingling at the base of the third, fourth or second toes. Pain also can spread from the ball of the foot out to the tips of the toes. In some cases, there also is the sensation of a lump, a fold of sock or a “hot pebble” between the toes. Typically, the pain of a Morton’s neuroma is relieved temporarily by taking off your shoes, flexing your toes and rubbing your feet. Symptoms may be aggravated by standing for prolonged periods or by wearing high heels or shoes with a narrow toe box.
A doctor can usually identify Morton’s neuroma during a physical exam. He or she will squeeze or press on the bottom of your foot or squeeze your toes together to see if it hurts. Your doctor may also order an X-ray of your foot to make sure nothing else is causing the pain.
Non Surgical Treatment
There are various options for treating the condition, depending on its severity. Self-treatment. Here are some simple steps that may improve symptoms. Wear supportive shoes with a wide toe box. Do not lace the forefoot of the shoe too tightly. Shoes with shock-absorbent soles and proper insoles are recommended. Do not wear tight or pointed toed shoes or shoes with heels more than 2 inches high. Use over-the-counter shoe pads to relieve pressure. Apply an ice pack to the affected area to reduce pain and swelling. Rest your feet and massage the painful area. There are drugs that may temporarily relieve the pain and other symptoms of Morton?s neuroma. Long-term use of these medications is not recommended. Anti-inflammatory drugs-Nonsteroidal anti-inflammatory drugs, such as ibuprofen or aspirin, may be taken orally to reduce pain and inflammation. Anti-inflammatory drugs can also be administered by direct injection into the skin. Local anesthetic. An anesthetic injection will temporarily relieve pain by numbing the affected nerve. Orthotics. These are custom-designed shoe inserts that can reduce some of the pain associated with Morton?s neuroma. Sometimes padding is placed around the toe area, and tape is applied to hold the padding in place.
The above measures are often sufficient to resolve Morton?s Neuroma. Should the condition persist or worsen despite these efforts, surgery may be recommended to remove the Neuroma. The surgery requires only a short recovery period, though permanent numbness in the affected toes can result, so such surgery is generally used as a last resort.
How can Morton?s neuroma be prevented? Do not wear tight shoes or high-heeled shoes for prolonged periods. Do wear shoes with a wide toe box so that your toes are not squeezed or cramped. Do wear athletic footwear with enough padding to cushion the balls of the feet when exercising or participating in sports.