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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.
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 ]
Another very rare allergy is sun allergy, aka polymorphous light eruption (PMLE). Similar to aquagenic urticaria, PMLE means that people’s skin develops hives, but this time when exposed to ...
Handling certain foods like limes and then going into the sun may cause an itchy rash or sunburn on areas of the body that the citrus juice touched. In severe cases, people may develop blisters ...
This allergy would make you fear being outside in the daylight. While this fear almost seems unbelievable, for 11-year-old Savannah Fulkerson , that fear is a reality.