Small changes in the skin often seem harmless, but in some cases they can be signs of cancer.

Colino is a contributor for TIME. sunscreen Colino is a contributor for TIME. Skin cancer is the most common type of cancer in the U.S., and it has increased dramatically in the last 50 years.

There are three common types of skin cancer in the United States: basal cell carcinoma, squamous cell carcinoma and melanoma. Merkel cell carcinoma is a rare type of skin cancer. Fred Hutch Cancer ...

Katlein Franca, MD, is a dermatologist and clinical associate professor of Dermatology & Cutaneous Surgery and Psychiatry & Behavioral Sciences at the University of Miami. Basal cell carcinoma often ...

Sunbathing is tan-talizing — but it comes at a price. Skin cancer is the most common cancer in the US — and one of the most preventable. Overexposure to ultraviolet (UV) radiation from the sun or ...