Also known as Morton's Interdigital Neuroma, Morton's Metatarsalgia, Morton's Neuralgia, Plantar Neuroma, Intermetatarsal Neuroma) What is a Morton's neuroma? Morton's neuroma is a condition characterized by localized swelling of the nerve and soft tissue located between two of the long bones of the foot (metatarsals - figure 1), which can result in pain, pins and needles, or numbness in the forefoot or toes.
The pain of Morton's neuroma occurs when the nerve connecting the toe bones (metatarsal bones) becomes irritated or compressed. The exact cause of the irritation is unknown, but it may be the metatarsal bones pressing against the nerve when the gap between the bones is narrow. This causes the nerve and surrounding tissue to thicken. Some experts believe that a number of other foot problems, including flat feet, high foot arches, bunions and hammer toes, may also play a role in Morton's neuroma.
Outward signs of Morton's neuroma, such as a lump, are extremely rare. Morton's neuroma signs and symptoms, which usually occur unexpectedly and tend to worsen over time, include, pain on weight bearing (while walking) - a shooting pain affecting the contiguous halves of two toes, which may be felt after only a short time (of weight bearing). Sometimes there may be a dull pain rather than a sharp one. Most commonly, pain is felt between the third and fourth toes. Typically, a patient will suddenly experience pain while walking and will have to stop and remove their shoe. Burning. Numbness. Parasthesia, tingling, pricking, or numbness with no apparent long-term physical effect. Commonly known as pins-and-needles. A sensation that something is inside the ball of the foot.
Your health care provider can usually diagnose this problem by examining your foot. A foot x-ray may be done to rule out bone problems. MRI or high-resolution ultrasound can successfully diagnose Morton's neuroma. Nerve testing (electromyography) cannot diagnose Morton's neuroma, but may be used to rule out conditions that cause similar symptoms. Blood tests may be done to check for inflammation-related conditions, including certain forms of arthritis.
Non Surgical Treatment
Initial therapies are nonsurgical and can involve one or more of the following treatments Changes in footwear. Avoid high heels or tight shoes, and wear wider shoes with lower heels and a soft sole. This enables the bones to spread out and may reduce pressure on the nerve, giving it time to heal. Custom shoe inserts and pads also help relieve irritation by lifting and separating the bones, reducing the pressure on the nerve. One or more injections of a corticosteroid medication can reduce the swelling and inflammation of the nerve, bringing some relief. Massaging the affected area can provide some momentary relief. Several studies have shown that a combination of roomier, more comfortable shoes, nonsteroidal anti-inflammatory medication, custom foot orthoses and cortisone injections provide relief in over 80 percent of people with Morton?s Neuroma. If conservative treatment does not relieve your symptoms, your physician may discuss surgical treatment options with you.
For those who are suffering severely with Morton?s Neuroma, surgery is a possibility. An orthopedic surgeon can remove the growth and repair your foot relatively easily. However, Morton?s Neuroma surgery is associated with a lengthy recovery time and there is a possibility that the neuroma may return.