When examining the skin, like any other organ, one must think of a system in which innumerable biochemical reactions take place, which through a continuous transformation of matter ensure the life of cells and tissues. In normal conditions, all these reactions are in dynamic equilibrium with each other, however, in the presence of particular situations the balance can be lacking, causing an imbalance that can be reflected on the skin in different ways such as changes in pH, changes in content water, changes in the composition of the hydrolipidic film. Within certain limits our body is able to restore normal…