Whether you've dabbled in skincare or not, you probably already know we wear sunscreen for a very important reason: The sun is the number one cause of wrinkles, hyperpigmentation, sun spots, skin cancer, and basically all of the signs of skin aging we try so desperately to avoid. The sun emits two types of ultraviolet UV rays, UVA and UVB. UVA rays penetrate the skin more deeply than UVB rays and can quickly fade tattoo ink. These types of harmful UV rays also cause many signs of skin damage, such as wrinkles and sagging that can last the rest of your life. UVB rays usually damage the outermost layer of the skin causing cosmetic sun damage such as discoloration and sunburn. Since tattoos are technically open wounds, this type of UV radiation can slow down the tattoo's healing process and cause blisters, scabbing, discoloration, and irritation. Even if it isn't a fresh tattoo, the sun's rays can damage old tattoos and speed up tattoo fading.