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.
The source of this pain is an enlargment of the sheath of an intermetatarsal nerve in the foot. This usually occurs in the third intermetatarsal space, the space between the third and fourth toes and metatarsals. It occurs here, at the site third intermetatarsal nerve, since this intermetatarsal nerve is the thickest being comprised of the joining of two different nerves. It also may occur in the other intermetatarsal areas, with the second interspace being the next most common location.
If you have a Morton?s neuroma, you may have one or more of these symptoms where the nerve damage is occurring, Tingling, burning, or numbness, pain, a feeling that something is inside the ball of the foot or a feeling that there?s something in the shoe or a sock is bunched up. The progression of a Morton?s neuroma often follows the following pattern. The symptoms begin gradually. At first they occur only occasionally, when wearing narrow-toed shoes or performing certain aggravating activities. The symptoms may go away temporarily by removing the shoe, massaging the foot, or by avoiding aggravating shoes or activities. Over time the symptoms progressively worsen and may persist for several days or weeks. The symptoms become more intense as the neuroma enlarges and the temporary changes in the nerve become permanent.
To arrive at a diagnosis, the foot and ankle surgeon will obtain a thorough history of your symptoms and examine your foot. During the physical examination, the doctor attempts to reproduce your symptoms by manipulating your foot. Other tests or imaging studies may be performed. The best time to see your foot and ankle surgeon is early in the development of symptoms. Early diagnosis of a Morton?s neuroma greatly lessens the need for more invasive treatments and may avoid surgery.
Non Surgical Treatment
Depending on your overall health, symptoms and severity of the neuroma, the condition may be treated conservatively and/or with surgery. Non-surgical methods for neuroma are aimed at decreasing and/or eliminating symptoms (pain). Wear proper supportive shoes. Use an arch support. Wear shoes with a wide toe box. Modify your activities. Lose weight. Wear shoes with cushion. Prescribe an oral anti-inflammatory medication. Anti-inflammatory medication is useful to significantly reduce pain and inflammation. A physical therapist may perform ultrasound and other techniques to reduce inflammation. You will also be instructed how to stretch your foot and leg properly. Padding and/or cushioning of the ball of the foot is an effective method of preventing physical irritation with shoes. A custom foot orthotic is a doctor prescribed arch support that is made directly from a casting (mold) of your feet, and theoretically should provide superior support compared to shoe insert that you would purchase from a pharmacy. A cortisone injection is a powerful anti-inflammatory medication that is used to rapidly reduce the pain associated with an inflamed nerve. The pain relief that you may experience from the injection(s) is often temporary. Typically injection(s) are administered once every 2 months for a total of 3 injections or until the pain is resolved. A sclerosing alcohol injection is placed around the involved nerve to weaken its capacity to report pain. In other words, the alcohol injection will ?deaden? the affected nerve. The pain relief that you may experience from the injection(s) can be permanent. Typically injection(s) are administered once every week for a few weeks until the pain is resolved.
Surgical treatment has provided relief in some cases while poor results and surgical complications have resulted in other cases. It is believed that ligament weakness, as opposed to the pinching of nerves in the foot, may be to blame for recurrent pain in these situations. For reasons which are not fully understood, the incidence of Morton?s Neuroma is 8 to 10 times greater in women than in men.
The best way to prevent a neuroma is by avoiding the things that cause them. Review your risk factors. If relatives have had similar problems, or if you know that you pronate or have any problem with the mechanics of your foot, talk with a podiatric physician about the correct types of shoes and/or orthoses for you. If you are not sure whether you have such a problem, the podiatric professional can analyze your foot, your stride and the wear pattern of your shoes, and give you an honest evaluation. Remember, though, that sometimes neuromas, like other conditions, can develop for no discernible reason. With this in mind, be good to your feet, and be aware of any changes or problems. Don?t wait to report them.