Melanoma is the third most common, but deadliest form, of skin cancer because of its ability to spread internally. This makes diagnosis and early treatment essential for survival. One person dies every hour because of melanoma. Melanomas can appear suddenly on any part of the body without warning, and also arise in a pre-existing mole. The most common sites of melanoma are the leg and vulva for women and the backs of men. Basal and squamous cell skin cancers are very common, usually present in a sun-exposed area of the body and present as a non-healing sore. Virtually all cases of non-melanoma skin cancer can be cured if detected and treated early. You should seek medical attention immediately or consider an online visit with Dr. Seraly & Associates at DermatologistOnCall.com if you notice anything on your skin changing, bleeding, growing, or acting differently.