Corns and calluses are formed when ground pressure or shoes press against the balls of the feet. The friction or pressure then causes a hard layer of skin around the foot to defend itself against irritation that may occur. The longer the pressure continues, the worse the corn can get. Deformities such as hammertoes and bunions often cause unnatural contact in the shoe, which in turn forms corns. As a result from one toe rubbing against another, a soft corn may form. You can treat this at home by soaking the foot in warm, soapy water then filing away the surface with a fine emery board. A podiatry visit will be necessary if pain continues to exist. Your podiatrist will let you know if your corn is caused by simply wearing the wrong shoes, deformity, or biochemical pathology. Several treatments are available depending on your pain level, life style, and activity level.