Morton's neuroma is a common, painful condition affecting the base of the toes, usually the third and fourth toes. The pain, which is sharp and severe (often described as like a red-hot needle), suddenly occurs while walking.
The pain happens because the nerve that divides between the metatarsal bones (toe bones) is irritated or compressed. The cause of this irritation is not exactly known, but it may be the metatarsal bones compressing the nerve when the gap between the bones is narrow. This causes the nerve to thicken.
It is rare for more than one nerve to be affected, and it usually only affects one foot.
Who is affected
Anyone can develop Morton's neuroma, but the condition is much more common in women. It tends to occur in women who wear high-heeled shoes, people who regularly do sports or those who have a particular foot shape, such as a high arch (see Causes for more information).
Outlook
Most people with Morton's neuroma will need surgery, which involves removing the affected nerve or releasing the pressure on it. Surgery is usually successful in treating the condition (see Treatment for more information).
Some people do not need to have surgery as their problem can be relieved by changing their footwear, taking painkillers and having a course of steroid injections.
Continue to next section: Symptoms of Morton's neuroma