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A 29-year-old female asked:

What are pin-head red dots under skin of my forearm & back of hand & lower leg after taking antihistamine? only occurs on 1 side of body at a time.

1 doctor answer1 doctor weighed in
Dr. Geoffrey Rutledge
Internal Medicine 39 years experience
Unusual: Antihistamines are an effective treatment for the red raised bumps that occur as part of an allergic reaction. A red rash after taking an antihistamine might represent an allergy to the medication or a reaction to one of the other components of the pill (coloring, filler, preservative, etc.) A photo of the rash and more information about time course & itchiness would help figure this out.
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Last updated Jul 26, 2017

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