From Wikipedia, the free encyclopedia

Photodermatitis
Classification & external resources

ICD-10	L57.8
ICD-9	692.79

Photodermatitis, or sometimes called by the nonscientific term sun poisoning, is a reaction of the skin to UV rays of the sun. It may be caused by a medication that makes the skin more sensitive, a skin product (e.g. sunscreen containing PABA, certain fragrances), or a vitamin deficiency. Doctors can determine the presence of the disorder through a photo test.

Contents 1 Causes 2 Symptoms 3 Prevention 4 Foods & Treatment 5 References

Many medications cause sun sensitivity. Causes of photoallergy may include:

• psoralens, coal tars, photo-active dyes (eosin, acridine orange)
• musk ambrette, methylcoumarin, lemon oil (may be present in fragrances)
• PABA (found in sunscreens)
• salicylanilide (found in industrial cleaners)
• Hexachlorophene (found in some Rx antibacterial soaps)
• Contact with sap from Giant Hogweed. Common Rue (Ruta graveolins) is another phototoxic plant commonly found in gardens.
• Tetracycline antibiotics

May result in swelling, a burning sensation, a red rash, and peeling of the skin.

Prevention includes avoiding contact with the sun:

• Stay inside during the brightest hours of the day, from noon to 3 p.m.
• Cover up: wear long sleeves, pants, and a wide-brimmed hat whenever harsh exposure is probable. Remember that cloud cover does not provide protection from UV rays.
• Avoid chemicals that may trigger a reaction (do not, however, stop taking medication without consulting a doctor).
• Wear sunscreen^[1].
• If the symptoms are severe, see a doctor.

The following foods or treatment may also help:

• Beta Carotene - found in carrots, not proven to be effective
• Omega-3 fatty acids - found in fish and flax seed
• Protein - will especially help individuals whose malnutrition may be a contributing factor.
• Vitamin B3, C, D, and E
• Green tea - antioxidants
• Calendula
• Aloe - external use

1. ^ AAD - The Sun and Your Skin, "Allergic Reactions" section