Therefore, considering its structure and its functions, a normal skin should be a smooth skin, pleasant to touch, because of the cohesion of the cells of its more superficial layers; a firm and supple skin because of the existence of a dense supportive tissue and of the presence of numerous elastic fibers of good quality; a mat skin through its balanced seborrheic production; a clear and pinkish skin because of the perfect functionality of its microcirculatory network.
In reality, a skin complying with all these characteristics would only exist in the healthy child before his/her puberty (3).
At cosmetological level, we must be content with a less strong definition and consider
normal skin as a young skin, structurally and functionally balanced and requiring no care apart from those necessary for its cleaning.