Dermatology is the branch of medicine dealing with the skin. It is a speciality with both medical and surgical aspects. A dermatologist is a specialist doctor who manages diseases related to skin, hair and nails and some cosmetic problems.Dermatology articles covering symptoms, diagnosis, staging, treatment, prognosis, and follow-up. Peer reviewed and up-to-date recommendations written by leading experts.Dermatology, medical specialty dealing with the diagnosis and treatment of diseases of the skin. Dermatology developed as a subspecialty of internal medicine in the 18th century; it was initially combined with the diagnosis and treatment of venereal diseases, because syphilis was an important possible diagnosis in any skin rash.