A member asked:

I had a tb test done last tuesday, the nurse said i am negative but i still have a red bump that looks like a mosquito bite on my arm.. is this nor...

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

TB Test: A positive test is measured by induration that is palpated on your arm - not by overlying swelling or bump

Answered 5/9/2017

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