What is skin cancer?

Skin cancer is the most common form of cancer. Fortunately, it is also the most curable. There are 2 forms of skin cancer: melanoma (the less common but more serious form) and nonmelanoma (the common, very treatable form). More than 1 million people will be diagnosed with skin cancer this year. Most will have nonmelanoma skin cancer. Almost all skin cancers are the result of too much exposure to ultraviolet light, which is in sunlight and in lights used in tanning salons.It's important to find skin cancer as early as possible. The best way to do this is to keep an eye on your skin, especially moles. The ABCDE rule (see below) can help you remember what to look for when you're checking any moles on your skin. If you notice any of these signs, talk to your doctor right away.