Polymorphous light eruption

Polymorphous light eruption is a rash that happens due to sensitivity to sunlight. This condition is called photosensitivity. It most often happens during spring, early summer or on a sunny vacation during the winter. Within hours of being in the sun, people with this condition might see an itchy, red rash. The spots appear most often on the upper chest, neck and on the back of the arms.

The rash usually goes away on its own within a few days. Until the rash is gone, limit your time in the sun. When you are outdoors, wear clothing that shields your skin from the sun and put sunscreen on skin that isn't covered. Creams you can buy without a prescription that ease itching, such as hydrocortisone cream, might help with the discomfort. Talk to your health care professional if the reaction is severe or painful.