Photodermatitis

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**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.

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

[edit] Causes

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

[edit] Symptoms

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

[edit] Prevention

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.

[edit] Foods & Treatment

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