Acute hives last less than 6 weeks. Chronic hives last longer and may recur for months or years. Either form needs urgent care when swelling affects the mouth, face, or throat, or when breathing becomes difficult. These 8 overlooked hive triggers can explain repeated outbreaks and show which details deserve closer attention. A good trigger hunt looks at timing, setting, symptoms, and repeat exposure. That wider view often reveals what the skin has been trying to say.
Infections Can Trigger Hives Even When Allergy Seems More Likely
Many people blame hives on the last thing they ate, then ignore the cold that started 2 days earlier. That instinct is understandable, yet it often sends the search in the wrong direction. The American Academy of Allergy, Asthma and Immunology says viral infections are the “most common” cause of acute urticaria. AAAAI also lists viral illness among the leading triggers. That means a sore throat, cough, stomach virus, or lingering congestion may matter more than lunch. When the immune system reacts to an infection, histamine can surge and produce raised, itchy welts. The skin then becomes the visible part of an immune response. That is why hives sometimes arrive before the real culprit is obvious.
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