A member asked:

Whitish, itchy, bumpy idiopathic hives turn flat & red after taking antihistamine. is that normal? maybe problems with mast cells / blood vessels?

A doctor has provided 1 answer
Dr. John Chiu answered

Yes and no: Hives can at times behave this way but if you only have hives then it is unlikely that your problem is a mast cell disorder. Be sure you use a moisturizer immediately after bathing since dry skin can cause itchy bumps. You may also try upping the antihistamine dose to 4 x daily. If still not helpful , it is time to see a dermatologist or allergist.

Answered 6/13/2017

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