Dermatology is the branch of medicine dealing with the skin, nails, hair and its diseases. It is a specialty with both medical and surgical aspects. A dermatologist treats diseases, in the widest sense, and some cosmetic problems of the skin, scalp, hair, and nails.
A dermatologist is the medical expert you should consult if you have any significant problem with your skin. Dermatology is the science that is concerned with the diagnosis and treatment of diseases of the skin, hair and nails.
Dermatologists must have expertise in basic sciences including microbiology, pathology, biochemistry, physics, physiology, and endocrinology. They must be familiar with all the other medical specialities because of their consultant work and because skin diseases are often associated with internal conditions.