Picture of Polymorphous Light Eruption
Polymorphous light (PLM) eruption is a skin condition that is triggered by exposure to sunlight. Symptoms of polymorphous light eruption tend to occur about 2 hours after sun exposure. Common symptoms such as redness, itching, and burning, tend to occur on sun-exposed areas like the backs of hands, outer portions of the forearms, and the chest. The lower legs of women are other areas frequently affected. There are cases of the disorder that run in families, often in those of Native American descent.
Treatment for polymorphous light eruption may include topical steroids, oral steroids, and desensitization with phototherapy. Avoiding sun exposure between 11 AM and 3 PM is advised.
Text Reference: American Osteopathic College of Dermatology: "Polymorphous Light Eruption"