A callus is an area of thickened skin located on the bottom of the foot, in most cases on the ball of the foot and/or heel. The most common cause of calluses on the ball of the foot is a “declination” of one or more of the long bones of the foot called metatarsal bones of which there are five in each foot. Since one or more of these metatarsal bones is/are lower than the others, the bone(s) bear more weight.
A callus forms under the end of the metatarsal bone in order to protect the bone from trauma. In the case of some severe calluses, a small core or “nucleus” can be found within the callus and if present, the patient usually feels as though he/she is walking on a small pebble. Using our special drill, a small cut is made across the metatarsal bone and the metatarsal head is repositioned toward the top of the foot enough to redistribute the weight at the ball of the foot.