What Is a Foot Corn or Callus?
A corn or callus is a thickened and hardened area of skin that forms in response to repeated friction, pressure, or other types of irritation. Calluses are typically found on repeated pressure points on the foot, and can be caused by activities such as manual labor, weightlifting, or a certain foot type. They are also common in people who wear tight or poorly fitting shoes.
Calluses form when the body tries to protect the underlying skin from further damage by producing an extra layer of skin cells. The result is a tough, often yellow or grayish patch of skin that can be painful if pressed or rubbed. While calluses are generally harmless, they can be unsightly or uncomfortable, and may need to be treated if they become infected or cause significant discomfort.