How long can a bout of hives last for? broke out all over body a week ago. old hives have gone but new ones keep popping up. taking reactine daily.

Usually : Urticaria (hives) is common, affecting 20% of the population. Acute hives usually resolve within 6 weeks (most patients fit into this category). Hives can become chronic if last >6 weeks. Common viral/bacterial infections can trigger an outbreak, however medications, foods, and insect stings can also cause acute hives but have the potential to lead to more serious complications.