The most common skin cancers, BCC and SCC develop from cells in the top layer of skin. They can have many different presentations, but often start as a growing bump, pink patch, or sore that will not heal. Common locations include sun-exposed areas such as the head, neck, back, chest, or upper arms. Fair skinned individuals are at greatest risk. BCC is virtually never life threatening but can be locally damaging if not treated. SCC has a slightly higher risk of spreading to lymph nodes or other organs. Treatment is most often with various forms or surgical excision, but in certain instances can be treated with topical medications or radiation.