Itchy?: I think what you are describing are hives which can usually be controlled by taking antihistamine . The cause if often obscure but allergy to food ,drug, and viral infection can induce hives. If they last more than 6 weeks, they are classified as chronic - about 30-40% are considered autoimmune, the rest is often unknown, If they don't itch, the diagnosis needs be reconsidered.
Answered 5/15/2017
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