Plantar calluses are tough, thickened skin that form on the surface of the bottom part of your foot (the plantar side). Plantar calluses occur.
Calluses normally develop on the soles of the feet, especially under the heels or balls, on the palms of the hands, and also on the knees. Corns often occur in.
Corns and calluses are often confused with one another. Corns generally occur at pressure points, typically the bottom of the feet and the sides.