What Causes Mortons Neuroma

Overview

Morton neuromaA Morton?s Neuroma is actually incorrectly termed, with the name suggesting it is a tumour or growth. Rather than a true neuroma it is actually what is called a perineural fibrosis, which means that over time the sheath surrounding the nerve becomes irritated, inflamed, and forms a thickened scar tissue.

Causes

Occupational hazards. Individuals whose jobs place undue stress on their forefeet (with or without wearing improper footwear) are among those who complain of neuromas. Podiatric physicians report that individuals who work on ladders, or who perform activities on their knees (such as doing landscaping, carpeting, flooring, or other work on the ground) are at risk for this problem, too, since these activities cause stress to the nerve near the ball of the foot. Those who engage in high-impact activities that bring repetitive trauma to the foot (running, aerobics, etc.) have a better than average chance of developing a neuroma at the site of a previous injury. To put it more simply, if you have sustained a previous injury to your foot (a sprain, stress fracture, etc.), that area of your foot will be more prone to neuroma development than an area that has not been injured. However, sports injuries aren?t automatically a ticket to neuromas. Trauma caused by other forms of injury to the foot (dropping heavy objects, for example) can also cause a neuroma to develop at the site of the previous injury. Much though we hate to say it, sometimes neuromas just develop and nobody knows why. The patient doesn?t have a previous injury, is wearing properly fitted shoes, and doesn?t stress his/her feet with any specific activity but the neuroma develops anyway. It is important to remember that some of the factors listed above can work alone, or in combination with each other, to contribute to the formation of neuroma.

Symptoms

Pain is usually increased by forefoot weight bearing activities (such as running), with narrow-fitting footwear, or with high heeled shoes. It is usually painful to firmly touch the affected region and, in chronic cases, pain and sometimes an audible click, may be heard when squeezing the foot and toes together with the hand. Often a localized area of swelling may be evident at the site of injury.

Diagnosis

A thorough subjective and objective examination from a physiotherapist is usually sufficient to diagnose a Morton’s neuroma. Investigations such as an X-ray, ultrasound, MRI, CT scan or bone scan may sometimes be used to assist with diagnosis, assess the severity of the injury and rule out other conditions.

Non Surgical Treatment

Rest. Continuing with normal training will increase pain and inflammation and prevent the injury from healing. Wear a metatarsal pad under the forefoot which will raise and spread the bones of the forefoot taking the pressure off the nerve. Wearing metatarsal pads in the shoes under the forefoot spreads the metatarsals creating more space for the nerve. See a sports injury professional who can advise on treatment and rehabilitation. Orthotic inserts may be required to correct any biomechanical dysfunction of the foot.intermetatarsal neuroma

Surgical Treatment

When early treatments fail and the neuroma progresses past the threshold for such options, podiatric surgery may become necessary. The procedure, which removes the inflamed and enlarged nerve, can usually be conducted on an outpatient basis, with a recovery time that is often just a few weeks. Your podiatric physician will thoroughly describe the surgical procedures to be used and the results you can expect. Any pain following surgery is easily managed with medications prescribed by your podiatrist.