Calluses are hard, thickened areas of skin that form when the skin tries to protect
itself against friction or pressure on the skin.
Calluses are rarely painful and tend to develop on pressure spots, such as the
heels, the balls of the feet, the palms and the knees.
Some factors that may cause calluses including:
– Standing, walking or running for long periods of time
– Going barefoot
– Physical hobbies, sports activities or work that cause repeated friction on
hands or feet
– Wear tight-fitting shoes
Untreated calluses might grow larger in size until you fix what caused them to
develop in the first place. At that time, your calluses may become painful and you
may need to search for treatment.