Corns on the feet are caused by long-term compression or friction, leading to excessive proliferation of the stratum corneum and thickening of the stratum corneum. Corns commonly occur in adults, particularly in women, and are frequently found on pressure-bearing areas such as the feet, soles, the inner edges of the big toe, the outer sides of the little toes, as well as the heels and tips of the toes which are areas of friction and pressure. The skin lesions are clearly defined, either light yellow or deep yellow in color, shaped like a cone with a smooth and slightly raised surface. Because they compress the peripheral nerves in the dermis, walking or when pressure is applied, the pain is quite noticeable.