Skin is the body’s largest organ, representing 12%–24% of body weight. It has multiple functions: providing a barrier and environmental protection, regulating temperature, producing pigment and vitamin D, and sensation. Anatomically, skin consists of many layers, the most important being the epidermis. In the base (basal layer) of the epidermis, cells grow and multiply, then transition from living to dead cells at the surface (stratum corneum or SC) and are eventually shed. Anything disturbing this process can lead to dry skin, known as “scale”.