It is important to wear sunscreen on exposed skin every month of the year. The UVB, or sunburn rays, are less intense in the fall and winter but can still damage your skin and cause skin thinning, skin cancer, wrinkles, and brown spots. A sunscreen of SPF 50 is recommended when you are outdoors, and it should be reapplied every two hours. If you are inside and away from windows, a reapplication may not be necessary. Be sure to use a generous amount! If you have never used sunscreen, it is not too late to start. It can make a big difference at any age.