It is dermatology that closely examines various skin diseases, nail disorders or problems such as eczema, and determines the diagnosis and method. Dermatologist is a medical practitioner who specializes in the diagnosis, treatment and prevention of skin diseases and skin cancers. These experts make the diagnosis easily and suggest an appropriate solution to the patient. In addition, many skin diseases can be transmitted sexually. These are usually treated by dermatologists. Fungal diseases, psoriasis, acne, venereal diseases such as puberty acne, eczema, syphilis, gonorrhea, treatment of all sexually transmitted skin diseases, skin cancers (diagnosis and treatment of melanoma), birthmarks, hair loss, drug allergies, hives (urticaria) treatment and investigation of its causes, sun allergy and its treatment, treatment of oral diseases, aphthae, tongue fungus and other diseases, genetically inherited skin diseases, warts, moles and molluscum, fungal diseases of the nail, nail thickening, diagnosis and treatment of ingrown nails and other nail diseases, oily skin, dandruff are performed in dermatology departments.