Enlarged benign growths of nerves, most commonly between the third and fourth toes. This nerve condition is caused by bones rubbing against and irritating the nerves. It is also caused by abnormal bone structure or pressure from poorly fitting shoes. It may cause pain, burning, or numbness between toes and in the ball of the foot. Treatment includes padding, taping, orthotic devices, and cortisone injections. Sometimes, surgical removal is required.