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A member asked:
Hi i was wondering my rast test came back negative but i was wondering why are my lips itchy after eating salmon?
A doctor has provided 1 answer
Less sensitive: RAST test is no longer used but may be confused with ImmunoCap IgE. Make sure that the test obtained was not IgG to salmon. Blood test is usually less sensitive than skin prick test and there may also be lab errors. It appears that you are allergic to salmon and the test just failed to confirm it. Options: Repeat the blood test for IgE, get a skin test for salmon or see an allergist,
Answered 3/13/2015
3.1k views
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