Acne is a skin condition characterized by pimples, blackheads, and whiteheads on the face, back, and chest. Learn about symptoms and treatment.
A common type of noncancerous skin tumor that resembles a wart and may bleed or be itchy.
Keloids are overgrowths of scar tissue that can sometimes appear when an injury heals. Learn about symptoms and treatment.
Frostbite is a condition in which the skin—and sometimes the tissues underneath the skin—freezes. Learn about symptoms and treatment.
Viral warts are viral infections of the skin that are most common on the hands and feet. Learn about symptoms and treatment.
Lichen planus is an inflammatory disease that can affect the skin, mouth, nails, genitals, and scalp. Learn about symptoms and treatment.
Actinic keratosis (AK) is a scaly and rough patch of skin caused by years of sun damage. Learn about symptoms and treatment.
Alopecia areata happens when the immune system attacks hair follicles. This causes the hairs in those follicles to fall out and not grow back.