Neuroma: A neuroma, also called "Morton's neuroma", is a pinched nerve at the forepart of the foot that may cause the toes to become numb, burn or tingle. The most commonly involved area is between the third and fourth toes. Anything that causes long term irritation of the nerve can cause a neuroma. The most common causes include abnormal foot movement and tight shoes. Control of the abnormal foot motion via orthoses is often the first line of treatment. If symptoms persist, cortisone and/or physical therapy may be used. If conservative measures are unhelpful surgical intervention is sometimes necessary.