Cystic acne is the most severe form of acne and is characterized by painful nodules on the face, back, chest, and neck. Read about treatment, medications, home remedies, and causes.

Everyone gets acne at some time, the right time to treat it is when it becomes bothersome or when the potential for scarring develops. Learn what causes, symptoms and what prevents pimples. What is cystic acne and blackhead looks like?

This itchy, contagious skin rash may be caused by a bacterial or fungal infection (dermatophytes). Learn about creams, sprays, and lotions that treat jock itch or tinea cruris. Read about jock itch treatment, symptoms, and medication.

Drug-induced liver disease comes in many types, and has many potential causes. Find out about drug-induced liver disease treatment, signs, and symptoms like itching, easy bruising, and jaundice, and learn how certain drugs can cause liver disease.

Rheumatoid arthritis (RA) is an autoimmune disease that causes chronic joint inflammation. Learn about stages, started ages, early signs, treatments, diagnosis, types, causes, medications, diet, and exercise.

Infection of the hair follicles is called folliculitis. Read about folliculitis causes, symptoms, home remedies, treatment, and prevention. Folliculitis types include hot tub folliculitis, Pseudomonas folliculitis, and pseudo folliculitis barbae.

Find out how to tell cold sores from pimples. Zits and oral herpes have different causes, signs and symptoms, and treatments. Cold sores appear as clusters of fluid-filled blisters, and acne may have pus in the center of the lesion. Cold sores are transmitted by person-to-person contact, while pimples are not.

Learn about leprosy (Hansen's disease), a disfiguring disease caused by the Mycobacterium leprae bacteria. Read about symptoms and signs (skin lesions), history, treatment, medications, and transmission of this contagious disease. Plus, see pictures.

Learn the symptoms, treatment, and diet for rosacea (adult acne), a skin condition that causes facial redness, dilated blood vessels, and ocular rosacea (in advanced cases). Rosacea dietary triggers include alcohol and chocolate.

This autoimmune skin disease causes blisters on the skin and sometimes lesions in the mouth. Get information about bullous pemphigoid treatment, symptoms, causes, and more.