A member 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?

A doctor has provided 1 answer
Dr. John Chiu answered

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?

Answered 12/8/2014

3.5k views

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