Malignant melanoma is a serious form of skin cancer that is more treatable when caught early. The best way to catch skin cancer is to see a dermatologist for regular skin exams and to perform monthly self-exams to look for changes in your skin moles.To perform the exam, stand in front of a mirror. Starting with your face and scalp work your way down, checking your entire body for skin changes. Use a hand-held mirror to check hard-to-see areas. Ask a friend or relative for help if you need it.As you become familiar with your moles and their appearance, you will be able to notice any signs of change. Be especially aware of new black moles, or moles that have changes in border, shape, size, color or texture.If you see a mole or skin change, see your dermatologist. And, remember, use sunscreen year-round to prevent skin cancer.