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.
The exact cause is as yet unclear. However there are a number of theories. Some expert s believe problems with the design of the foot makes some people more prone to Morton?s neuroma. Having flat feet or a high arch for example encourages the foot to slide forwards which can put excess pressure on the metatarsals. Bunions and hammer toes also increase the likelihood of developing Morton?s. However simply wearing high heels or any form of tight shoes that put pressure on the bones in the feet can also lead to a Morton?s . Typically the condition comes on between the age of 40 and 50. It is far more common in women than men – three out of four sufferers are women.
Patients will complain of numbness, a ?pins and needles? type of tingling and loss of sensation in the toes. Burning pain in the ball of the foot that may radiate into the toes. The pain generally intensifies with activity or wearing shoes. Night pain is rare. There may also be numbness in the toes, or an unpleasant feeling in the toes. Runners may feel pain as they push off from the starting block. High-heeled shoes, which put the foot in a similar position to the push-off, can also aggravate the condition. Tight, narrow shoes also aggravate this condition by compressing the toe bones and pinching the nerve.
Your podiatric physician will begin by taking a history of your problem. Assist him or her by describing your condition as well as you can. Keep track of when the symptoms started and how, any changes you?ve noted (whether the pain has gotten worse, or whether other symptoms have appeared as well, etc.). If you?ve noticed that certain activities or footwear make things worse or bring about additional symptoms, be sure to mention that. If you work in specific footwear, or if you participate in any certain sports, bring the shoes you use. Your doctor may be able to learn quite a lot about your condition that way!
Non Surgical Treatment
Treatment for Morton?s Neuroma usually begins conservatively, with a change in lifestyle choices. People suffering from the condition may find pain relief by reducing activity levels, changing footwear, using orthopedic supports, reducing weight. Medications are also available to help relieve the pain of Morton?s Neuroma. Over-the-counter medications are sometimes very helpful in reducing pain and inflammation. Your health care provider can also provide you with anesthetic or corticosteroid injections. These help to numb the area affected by the neuroma, and reduce inflammation.
Majority of publications including peer review journal articles, surgical technique description and textbooks promote surgical excision as a gold standard treatment. Surgical excision is described as the most definitive mode of treatment for symptomatic Morton?s neuroma with reported success rates varying between 79% and 93%. Various surgical techniques are described, essentially categorised as dorsal versus plantar incision approaches. Beyond this the commonest technical variation described as influencing the outcome of surgery involves burying and anchoring transacted nerve into soft tissue such as muscle.