What is a crust?

A crust is formed by the accumulation of sebum, dead skin cells, and other bodily fluids that gather over a wound or lesion, effectively creating a protective layer as the skin heals. This process is part of the body's natural response to injury, where the crust helps to keep out bacteria and other harmful agents while the underlying tissue regenerates. In the context of nail technology and skin care, understanding the formation of crusts can inform practices related to wound care, infection prevention, and proper techniques for managing nail and skin health.