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A member asked:
What are welts on the skin usually caused by?
A doctor has provided 1 answer
Multiple causes: Welts or hives on the skin are usually triggered by increased allergy cell activation (mast cells) that release histamine. If present for less than 6 weeks, they can be secondary to medication, infection, food, or sting. If they last greater than 6 weeks, there is often no known cause or there can be an autoimmune etiology.
Answered 7/21/2018
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