A member asked:

In my allergy report histamine reading is given 5 stars. what does this mean?

A doctor has provided 1 answer
Dr. Natalie Sieb answered

Specializes in Family Medicine

Test Control: Histamine is used as a control on allergy tests. Meaning we expect you to have a reaction to histamine because that's the chemical that causes the symptoms seen on the skin in an allergic reaction and the presence of a reaction to it means your immune system is working properly by reacting to this chemical in the way we would expect it to. It makes your allergy test results valid.

Answered 7/6/2014

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