Rashes should be examined before moving on to causes and treatment. Urticaria (hives) are common, wax and wane over time, and leave no mark. They can recur over days, weeks, months, or years. The longer they recur, the harder it is to find a cause. Itching can be treated with Zyrtec (cetirizine) or other over-the-counter antihistamines. Seek an allergist to identify the culprit, if there is one
Answered 9/17/2021
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