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4. Duration of a Sun Allergy

The duration is different depending on the type of sun allergy. For instance, a PMLE rash typically disappears within a couple of days. In contrast, individual hives caused by solar urticaria generally fade within two hours. The duration of photoallergic eruptions tends to be unpredictable, while actinic prurigo follows a seasonal pattern.

rash sun allergy

Ake Ngiamsanguan / Getty Images

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