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Butler, PA
A 17-year-old female asked:

2 days ago got tested for allergies (scratch test) only spots w/reaction were histamine+mold. now there are red spots (not the pricks) itchy, causes?

1 doctor answer1 doctor weighed in
Dr. John Chiu
Dr. John Chiu answered
Allergy and Immunology 57 years experience
ST reaction: The skin test response to allergen may start within minutes followed by a delayed response from 2-8 hrs later. The delayed reaction may linger for a few days. However the reaction consists usually of a raised wheal and not just redness. Are your red spots raised or flat?

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Last updated Dec 8, 2014

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