Photodermatitis: Difference between revisions
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==Signs and symptoms== |
==Signs and symptoms== |
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Photodermatitis may result in swelling, a burning sensation, a red itchy [[rash]] sometimes resembling small [[blisters]], and peeling of the skin. [[Nausea]] may also occur. There may also be blotches where the itching may persist for long periods of time. In these areas an unsightly orange to brown tint may form, usually near or on the face. |
Photodermatitis may result in swelling, a burning sensation, a red itchy [[rash]] sometimes resembling small [[blisters]], and peeling of the skin. [[Nausea]] may also occur. There may also be blotches where the itching may persist for long periods of time. In these areas an unsightly orange to brown tint may form, usually near or on the face. |
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also if you spend 2 hours on a jet ski under the sun and your wife brings you ice cream instead of sun screen. |
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==Causes== |
==Causes== |
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Revision as of 17:31, 16 July 2013
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 | This article needs additional citations for verification. (June 2008) |
| Photodermatitis | |
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| Specialty | Dermatology, immunology  |
Photodermatitis, sometimes referred to as sun poisoning or photoallergy, is a form of allergic contact dermatitis in which the allergen must be activated by light to sensitize the allergic response, and to cause a rash or other systemic effects on subsequent exposure. The second and subsequent exposures produce photoallergic skin conditions which are often eczematous.
Signs and symptoms
Photodermatitis may result in swelling, a burning sensation, a red itchy rash sometimes resembling small blisters, and peeling of the skin. Nausea may also occur. There may also be blotches where the itching may persist for long periods of time. In these areas an unsightly orange to brown tint may form, usually near or on the face.
also if you spend 2 hours on a jet ski under the sun and your wife brings you ice cream instead of sun screen.
Causes
Many medications and conditions can cause sun sensitivity, including:
- 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)
- St John's Wort, used to treat clinical depression
- Hexachlorophene (found in some ℞ antibacterial soaps)
- Contact with sap from Giant Hogweed. Common Rue (Ruta graveolins) is another phototoxic plant commonly found in gardens
- Tetracycline antibiotics (e.g., tetracycline, doxycycline, minocycline)
- Benzoyl peroxide
- Retinoids (e.g., isotretinoin)
- NSAIDs (e.g., ibuprofen, naproxen sodium)
- Fluoroquinolone antibiotic: Sparfloxacin in 2% of cases
- Amiodarone, used to treat atrial fibrillation
- Pellagra
Photodermatitis can also be caused by plants. This is called phytophotodermatitis.
Prevention
Prevention includes avoiding exposure to the sun and wearing sun block on the affected area.
- Cover up: wear long sleeves, slacks, and a wide-brimmed hat whenever harsh exposure is probable
- Avoid chemicals that may trigger a reaction
- Wear sunscreen[1][2] at least factor 30 with a high UVA protection level
- Wear gloves and/or remain indoors after handling fruits or plants which increase sensitivity to light
See also
References
- ^ Archived AAD - The Sun and Your Skin, "Allergic Reactions" section
- ^ AAD - Sunscreens