Use this tag for questions about skin, nails or hair. This includes questions about normal structure or function as well as diseases or pathology.
Questions about diseases or disorders of the skin fall under the general tag dermatology, which is the branch of medicine dealing with the skin. This includes the skin's structure and function as well as any disorders or diseases.
It also deals with structures generated in/by the skin, e.g. sweat, oils/sebum, hair, nails, moles, warts, skin coloration and its disorders, etc.