Surgeon General: Tanned Skin Is Damaged Skin
Medical Skin Aesthetics can't emphasize the importance of daily UVB and UVA sunblock protection for the whole body and face. Repeated sun exposure without protection can cause extreme sun damage, including wrinkles, brown spots, and the risk of skin cancer. Our medical skin clinic carries true broad-spectrum UVA/UVB sunblocks for everyday wear. Sunblock should be worn regardless if not in direct sun and reapplied every thirty minutes if in direct sun. Please don't forget to reapply after swimming, as there are no true waterproof sunblocks.
http://www.surgeongeneral.gov/library/calls/prevent-skin-cancer/index.html