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unknown rash

I have dry bumps throughout my arms kinda looks like a rash. Is this eczema or a heat rash?
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5618019 tn?1371025343
I Think It's an Eczema ..
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875426 tn?1325528416
It might be keratosis pilaris.  See:
http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002433/
Helpful - 0
4851940 tn?1515694593
Have you touched anything recently or been near some plants?

If your arms have been not been covered up, it may well be an allergic reaction.  

You do not say whether the rash itches or not.

If they are bothersome then see your doctor to help identify what this rash is.  Without seeing your rash it is difficult to say what it is.  

Wash the area with gentle soap and apply antiseptic cream.
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