What Does a Positive TB Test Look Like?

By Staff WriterLast Updated Apr 6, 2020 3:38:30 PM ET
positive-tb-test-look-like
Javier Larrea/age fotostock/Getty Images

A positive TB, or tuberculin, test appears red and raised at the test puncture site, according to WebMD. For high-risk patients, a small red bump at the site of puncture is considered positive, and for a low-risk patient, a larger red bump is considered positive.

Advertisement