A member asked:

Tb read as neg by 2 diff drs at 46 and 66 hrs. i kept feeling it continuously over the following days now it is irritated/seems swollen. turned +?

A doctor has provided 1 answer

No: Ppd (tb skin test) is only valid for reading between 48 and 72 hours. After that no matter how it looks or feels, the result thereof is not valid. It will fade and heal eventually. No worries!

Answered 8/19/2013

4.9k views

Thank

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