Medical Etiology: (information for health professionals)


Definition:
Areas of thickened skin on the plantar surfaces of the foot and/or inter-phalangeal joints.

Biomechanical etiology:
Corns and Callous develop from excess friction and rubbing on the foot. Corns normally develop on the upper joints of the toes, whilst callous generally develops under the sole of the foot (especially under the big toe/little toe joint and central ball of the foot). Corns and callous commonly develop when excess pronation disrupts the normal metatarsal bone relationship in the foot and this causes the toes to claw. Friction & rubbing from your footwear then causes corns and callous to develop on the tops of your toes and/or the bottom of your feet.

Treatment:
Orthotic devices are designed to control excess pronation and prevent plantar-flexion of the metatarsal bones and furthermore clawing of the toes. Thereby removing this friction and rubbing which causes corns and callous.