Photo-dermatitis is an abnormal skin reaction to sunlight, or more specifically to ultraviolet (UV) rays. It can be acute (sudden) or chronic (ongoing).
CAUSES—
- Reaction of immune system to UV rays
- Fragrances
- Sunscreens with PABA
- Industrial cleaners that contain salicylanilide
- Chemicals found in medicines
- Antibiotics( tetracycline and sulfonamides)
- Antifungals(griseofulvin)
- Coal tar derivatives and psoralens, used topically for psoriasis
- Retinoids( tretinoin )and medications containing retinoic acid, used for acne
- Nonsteroidal anti-inflammatory drugs (NSAIDs)
- Chemotherapy agents
- Sulfonylureas, oral medications used for diabetes
- Antimalarial drugs(quinine)
- Diuretics
- Antidepressants(tricyclics)
- Anti-psychotics(phenothiazines)
- Anti-anxiety medications( benzodiazepines)
- Chemicals in cosmetics and foods
SYMPTOMS—
Itchy, scaly, blistery, reddening of the skin
Prevention
- Limit skin exposure to sun, especially intense midday sun.
- Use PABA-free sunscreens that protect against UVA and have a sun protection factor (SPF) of 30 – 50.
- Cover up with a long-sleeved shirt, long pants, and a wide-brimmed hat.
- Beware of using any product that causes sun sensitivity .
TREATMENT-–
- Cool, wet dressings.
- Phototherapy
- Medicines
- Multivitamins
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