Getting sun is a simple way to help your skin condition. But that doesn't mean you should go bake at the beach. Too many rays can make your symptoms worse and raise your chances of getting skin cancer. If your doctor tells you to get some sun each day, make sure you don't stay out too long. About 20 minutes a day should be enough. Use a sunscreen with an SPF of 30 or higher with zinc oxide on areas of your skin that don't have psoriasis.