Dermatology is a branch of medicine that deals directly with skin and skin diseases. It can be easily said that it is a specialty in both medical and surgical aspects. It plays an important role in the examination, investigation and diagnosis of skin and skin disorders. Physician called dermatologist; dealing with all diseases related to skin, hair and nails, and some other cosmetic problems. Skin, oils, hair, nails, oral and genital membranes, cancers, cosmetic and aging conditions are all within the field of dermatology.