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.

Causes

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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
• Tetracycline antibiotics

Symptoms

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May result in a red, painful or itchy rash.

Prevention

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Prevention includes avoiding contact with the sun:

• Stay inside during the brightest hours of the day, from 12-3.
• 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)
• If the symptoms are severe, see a doctor.

Foods

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The following foods 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

Dermatology