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A member asked:
What could be the cause of a weird rash on back of arm?
A doctor has provided 1 answer
Keratosis Pilaris: The most common cause of rash on the backs of the arm is keratosis pilaris. It is found in 50% of the population and presents as fine bumps with surrounding redness. It can also be seen on the sides of face as well as thighs. There are no great treatment options. I would recommend seeing a dermatologist if you want to have a definitive diagnosis. Other causes could be eczema or tinea versicolor.
Answered 8/6/2013
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