Dermatologist diagnoses the causes of skin lesions and implements appropriate treatment, and dermatology is the branch of medicine dealing with skin diseases. Related medical disciplines to dermatology include cosmetology and venereology.

The dermatologist examines the skin and looks for possible causes of abnormalities in its appearance. It is worth remembering that the disturbing changes do not necessarily have to originate from a malfunction of the skin itself. Such changes are often the consequence of internal diseases, e.g. hormonal changes, cancer, infectious diseases, allergies and venereal diseases.