Both corns and calluses are the skin’s way of protecting itself from repetitive friction, rubbing, and other chronic irritation. Corns and calluses commonly develop on the feet from wearing shoes which fit poorly.
What is a callous?
Thickened skin on the bottom of your foot is called a corn or a callus. They are the body’s reaction to pressure or friction from walking. They form under pressure points in the bottom of the foot.