What are hives? Urticaria, also known as hives, is an outbreak of red bumps or welts on the skin that various triggers can cause. If you have experienced an outbreak before or for the first time, it is important to know your treatment options with your allergist. Understanding a Hives Outbreak What are hives, and what are their causes? Various internal and external triggers can cause hives (urticaria). Hives typically will fade after 24 hours, but some outbreaks can last longer depending on the type of urticaria:...
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