2 doctors weighed in:

How do I get rid of back-of-the-arm rashes?

2 doctors weighed in
Dr. Tara Passow
Dermatology
1 doctor agrees

In brief: Keratosis pilaris?

Probably the most common rash on the back of the upper arms.
There's no perfect way to treat it. Some moisturizers with ammonium lactate can help soften and smooth. A prescription product like tretinoin (retin-a and others) can help smooth the areas.

In brief: Keratosis pilaris?

Probably the most common rash on the back of the upper arms.
There's no perfect way to treat it. Some moisturizers with ammonium lactate can help soften and smooth. A prescription product like tretinoin (retin-a and others) can help smooth the areas.
Dr. Tara Passow
Dr. Tara Passow
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