Sunscreen protects the skin from sun damage. The sun rays contain the harmful UV rays that cause harm to the skin. Sun rays can cause serious skin diseases like skin cancer. It also causes aging of skin and wrinkles. Sunscreen helps in preventing these problems. You should choose a sunscreen that has minimum 30 SPF. Apply it fifteen minutes before you go out in the sun. It is important to apply it face as well as other body parts like neck, ears and legs. Apply the sunscreen after two hours again. You should use the sunscreen daily. It is important to know the correct method of applying sunscreen. Following is a detailed guide on how to apply sunscreen.