What condition can develop due to continued, repeated pressure on any part of the skin?

The condition that can develop due to continued, repeated pressure on any part of the skin is a callus. A callus forms as a protective response from the skin to increased friction or pressure, typically in areas subject to repeated rubbing or pressure, such as the palms of the hands or the soles of the feet. When the skin experiences constant stress, it thickens in that area to provide additional protection, leading to the development of a callus.

In contrast, a scar is a mark left on the skin after a wound has healed, and it does not form from pressure. A blister results from fluid accumulation between skin layers due to friction or burns, rather than a thickening response like a callus. A rash typically results from irritation or an allergic reaction rather than from pressure, and does not share the same characteristics as a callus. Understanding these differences highlights why calluses are specifically associated with sustained pressure on the skin.