5 doctors weighed in:

I've had bad allergies my whole life. Reacted to skin test with red itchy bumps however doctor said the test was negative. Why did I react?

5 doctors weighed in
Dr. Gary Steven
Internal Medicine - Allergy & Immunology
4 doctors agree

In brief: Hard to say

There are conditions in which the skin does not react properly to a skin test.
Thus, to rule that out, we always place what is called a "positive control" - one of the tests is not an allergen, but histamine, which is the chemical released in an allergic reaction. If you don't react to histamine, we know that something is wrong with your skin. So a negative panel always has ONE itchy bump.

In brief: Hard to say

There are conditions in which the skin does not react properly to a skin test.
Thus, to rule that out, we always place what is called a "positive control" - one of the tests is not an allergen, but histamine, which is the chemical released in an allergic reaction. If you don't react to histamine, we know that something is wrong with your skin. So a negative panel always has ONE itchy bump.
Dr. Gary Steven
Dr. Gary Steven
Thank
Get help from a real doctor now
Dr. Christopher Crosby
Board Certified, Dermatology
13 years in practice
93K people helped
Continue
108,000 doctors available
Read more answers from doctors