Photodermatitisphoto dermatitis, photo dermatitis treatment
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 It is distinct from sunburn
- 1 Signs and symptoms
- 2 Causes
- 3 Prevention
- 4 See also
- 5 References
Signs and symptoms
Photodermatitis may result in swelling, difficulty breathing, 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
Many medications and conditions can cause sun sensitivity, including:
- Sulfa used in some drugs, among them some antibiotics, diuretics, COX-2 inhibitors, and diabetes drugs
- Psoralens, coal tars, photo-active dyes eosin, acridine orange
- Musk ambrette, methylcoumarin, lemon oil may be present in fragrances
- PABA found in sunscreens
- Oxybenzone UVA and UVB chemical blocker also 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 graveolens is another phototoxic plant commonly found in gardens Phototoxicity caused by plants is called phytophotodermatitis
- Tetracycline antibiotics eg, tetracycline, doxycycline, minocycline
- Benzoyl peroxide
- Retinoids eg, isotretinoin
- Some NSAIDs eg, ibuprofen, naproxen sodium
- Fluoroquinolone antibiotic: Sparfloxacin in 2% of cases
- Amiodarone, used to treat atrial fibrillation
Photodermatitis can also be caused by plants like the Dictamnus commonly known as the "Burning Bush", a genus of flowering plant in the Rutaceae family This is called phytophotodermatitis
Prevention includes avoiding exposure to chemicals that can trigger the reaction, such as by wearing gloves, or avoiding sunlight or wearing sunscreen preferably with at least factor 30 and with a high UVA protection level on the affected area
- Light sensitivity
- Solar urticaria
- ^ http://allergiesaboutcom/od/medicationallergies/a/sulfahtm
- ^ Rodriguez E, Valbuena MC, Rey M, Porras de Quintana L 2006 Causal agents of photoallergic contact dermatitis diagnosed in the national institute of dermatology of Colombia Photodermatol Photoimmunol Photomed 224: 189-192
- ^ Archived AAD - The Sun and Your Skin, "Allergic Reactions" section
- ^ AAD - Sunscreens
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