How Does a Sun Rash Form?
What Causes Sun Rash Polymorphic light eruption, more commonly known as “sun rash,” usually is caused by sensitivity to light, most often triggered by exposure to sunlight. Although the rash can take different forms, raised pink or red spots typically appear on the V of the neck, arms, and back of the hands. The rash may be seen on the chest and lower legs as well. In some cases, the rash resembles dermatitis, where the affected area may be covered in small blisters, followed by large, dry, red patches. Women between the ages of 20 and 40 who have fair skin are those most affected, although anyone can develop sun rash if out in the sunlight too long. Other Causes The ingredients contained in some sunscreens, cosmetics, suntan lotions, cortisone creams or antibiotic ointments applied to the skin can trigger a reaction when exposure to sunlight occurs. Taking common medications, including antibiotics, certain oral contraceptives and diuretics used to treat high blood pressure can cause p
