Dermatologists are medical doctors who specialize in diagnosing and treating diseases and conditions of the skin, hair, or nails, such as acne, psoriasis, warts, or skin cancer. They also treat cosmetic issues, like sagging skin, scars, and wrinkles.

Dermatologists may prescribe medicines as well as perform surgery for skin disorders. They may specialize in treating specific age groups, such as a pediatric dermatologist, who only treats children.

Dermatologists that are certified must pass certain exams, such as those given by the Royal College of Physicians and Surgeons of Canada.