How to Treat Sun Rash. Many people with light-colored skin have a higher sensitivity to the sun. Exposure to the sun can cause a sun rash--little red blisters or spots on the skin's surface. A sun rash is uncomfortable, making your skin itchy, and usually occurs within hours or even minutes of being exposed to the sun. Follow these steps to ease discomfort caused by a sun rash.
Avoid scratching those blisters. It may be the first thing you want to do to relieve the itching associated with a sun rash, but do not scratch them. It could lead to an infection, which will require a doctor's visit and antibiotics.
Treat your body to a nice soak in a bathtub of cool water to ease the itchiness and discomfort caused by the sun rash. Add cornstarch, oatmeal or baking soda to the bath to soothe your skin even more.
Wear light, cool clothes on your skin during the day to avoid irritating the sun rash.
Apply Aloe vera gel--either store-bought or from an Aloe vera plant--to treat the sun rash to help relieve the pain.
Put hydrocortisone cream on the sun rash to soothe the itch.