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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.
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