Practice sun-safe behaviors and use sunblock if you have sun allergies.

If you are allergic to sunlight, you might experience small blisters and a raised, red rash which is often intensely itchy: don't scratch this rash, as it will only spread and you might cause further damage to your skin. Consult a doctor if the itch is unbearable, as he or she might be able to prescribe you medication to control the itch. Allow the rash to clear up on its own, and limit the amount of direct sunlight you expose yourself to next time. The best advice for someone with an allergy to sunlight is to avoid it. Of course, this isn't always possible, so common sense and good sun safe habits will prevent most problems. Be sure to wear sunscreen or sunblock for added protection, though if your skin is sensitive, you should patch test any new product you plan to use.