Dermatology is the medical speciality that deals with disorders and diseases (including cancers of the skin.) It also deals with disorders of hair, nails and mucous membranes. A dermatologist is a medical specialist in dermatology.
The earliest treatment of skin conditions can be found in writings in ancient history. The ancient Egyptians treated the skin with various chemicals to try to achieve various medicinal and cosmetic results. The physician Avicenna wrote “The Canon of Medicine,” which was published in 1025 and this described treatments for a number of skin conditions, including skin cancer.