2. Under Your Fingernails
Talk about a good place to hide! Who in the world is going to think of checking their fingernails for signs of cancer? It’s not surprising that the sun is a major cause of skin cancer that can form under your fingernails, and that’s why it’s a good idea to apply sunscreen there when you are going outside, but there is another cause that may be more surprising. Ultraviolet lights are now used to put a finishing touch on some treatments that are applied by nail salons and that could contribute to the formation of skin cancer under your nails, so be aware of any irregularities and take some time to check your nails periodically.