11. Red Patchy Skin.
A skin rash is actually more common than skin cancer, but the two of these closely are related. A skin rash, or redness on your skin, can be present when a certain type of cancer appears on your skin. With this type of skin cancer, a rash or redness appears, and it may be hidden as eczema or even psoriasis. If you notice a small area on your skin and you think it is a rash, you should have your doctor evaluate your skin to see what exactly the condition may be. If caught early, the potential skin cancer can be treated effectively.