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Solar urticaria is an immunoglobulin E-mediated hypersensitivity that can be introduced through primary or secondary factors, or induced by exogenous photosensitization. [15] [16] Primary SU is believed to be a type I hypersensitivity (a mild to severe reaction to an antigen including anaphylaxis) in which an antigen, or substance provoking an immune response, is "induced by UV or visible ...
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.
Phytophotodermatitis, also known as berloque dermatitis, [1] [2] [3] margarita photodermatitis, [4] [5] lime disease [6] or lime phytodermatitis [6] is a cutaneous phototoxic inflammatory reaction resulting from contact with a light-sensitizing botanical agent (such as lime juice) followed by exposure to ultraviolet A (UV-A) light (from the sun, for instance).
To treat a rash or burn, apply a cool compress or a mild topical steroid like 1% hydrocortisone. People can also take an over-the-counter anti-inflammatory like ibuprofen, Piliang said.
Hives might not cause any discoloration on darker skin, so be alert for raised patches or welts—those could be a sign of urticaria. If you have shortness of breath, throat tightening, or tongue ...
“Hives are usually due to an allergic reaction, ... Wear loose-fitting clothing, keep your home at a comfortable temperature, and avoid spending time in the sun. 10. Try Witch Hazel .
The rash may persist for many days to a couple of weeks, [5] resolving spontaneously without scarring as long as further sunlight exposure is avoided. [ 2 ] Recurring yearly, the eruption can sometimes last longer than a few days if persistent and repeated sun exposure occurs. [ 2 ]
With sunny summer weather can come new skin rashes, including heat rash and sun poisoning. But some can be severe, so it's important to know the differences.