Hives (urticaria), also known as welts, is a common skin condition with an itchy rash of pink to red bumps that appear and disappear anywhere on the body. An individual lesion of hives typically lasts a few hours (up to 24 hours) before fading away, and new hives can appear as older areas disappear.
https://www.skinsight.com/skin-conditions/adult/urticaria-hives

