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A member asked:
Four welt like spots on inner left arm, one welt now starting to blister---causes?
A doctor has provided 1 answer
Welts: Most common cause would be an allergic response. They also can be cause by systemic diseases and autoimmune diseases. Start with your regular doctor who may then send you to an allergy/immunology doctor.
Answered 9/3/2015
2.3k views
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