Morton?s neuroma is a swollen nerve in the distal portion of the foot. The enlarged portion of the nerve represents scarring within the plantar nerve that occurs after chronic compression and/or repetitive injury. This may come about when the toes are squeezed together for too long, as can occur with the chronic use of high heels. The nerve that runs between your toes will swell and thicken. This can cause pain when walking. The symptoms of Morton?s neuroma can include burning pain in the foot, the feeling of a lump inside your foot, pain between the third and fourth toes typically but it can occur between other toes.
Some experts believe that other foot conditions may also be associated with Morton’s neuroma. This is because other conditions may cause the metatarsal bones to rub against the nerve in your foot. Foot problems that may increase your risk of developing Morton’s neuroma include abnormally positioned toes, high arches, where the arch or instep of your foot is raised more than normal, flat feet, low arches or no arches at all, bunions a bony swelling at the base of the toe. Hammer toe, where the toe is bent at the middle joint. Being active and playing sport can make the painful symptoms of Morton’s neuroma worse. In particular, running or sports that involve running, such as racquet sports, can place extra pressure on the nerve in your foot, which can aggravate the problem.
The most common symptom of Morton’s neuroma is localized pain in the interspace between the third and fourth toes. It can be sharp or dull, and is worsened by wearing shoes and by walking. Pain usually is less severe when the foot is not bearing weight.
The physician will make the diagnosis of Morton’s neuroma based upon the patient’s symptoms as described above in an interview, or history, and a physical examination. The physical examination will reveal exceptional tenderness in the involved interspace when the nerve area is pressed on the bottom of the foot. As the interspace is palpated, and pressure is applied from the top to the bottom of the foot, a click can sometimes be felt which reproduces the patient’s pain. This is known as a Mulder’s sign. Because of inconsistent results, imaging studies such as MRI or ultrasound scanning are not useful diagnostic tools for Morton’s neuroma. Thus the physician must rely exclusively on the patient’s history and physical examination in order to make a diagnosis.
Non Surgical Treatment
The most important factor in the treatment of Morton’s neuroma is changing footwear. Sometimes a cushioned dome pad can be worn inside the shoe and this helps spread the metatarsal heads and decrease pressure on the nerve. There are other products that can be worn between the toes with certain types of shoes or when the client is barefoot. These toe spacers will help reverse biomechanical patterns that aggravate the nerve compression. Massage can be helpful, but should not be performed with deep pressure between the metatarsal heads. Additional pressure in this region can aggravate the nerve compression and prolong the pathology.
Surgery to excise the neuroma is usually performed under general anaesthetic in a day surgery facility. After surgery you will have to keep your foot dry for two weeks. Generally neuroma surgery allows for early weight bearing and protection in some type of post op shoe gear. Some neuromas may reoccur, but this is rare. Most studies on patient satisfaction after neuroma surgery show approximately 90% reduction of pain and about 85% of all patients rated the overall satisfaction with the results as excellent or good.
Although the exact causes of neuromas are not completely known, the following preventive steps may help. Make sure your exercise shoes have enough room in the front part of the shoe and that your toes are not excessively compressed. Wear shoes with adequate padding in the ball of the foot. Avoid prolonged time in shoes with a narrow toe box or excessive heel height (greater than two inches).