Work: If you are wearing short sleeves it could be an exposure to work related chemicals. Patch testing can help what is causing the allergy.
Answered 12/8/2014
6.3k views
Rash: If the arms are covered, it could be the clothing fabric, soaps, detergents, or any lotion you are placing only on this region. If it is sun-exposed, it could be photoallergic dermatitis (aka reaction to the sun).
Answered 3/21/2013
5.2k views
3 doctors weighed in across 2 answers
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5 doctors weighed in across 2 answers
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A doctor has provided 1 answer
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