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A member asked:
How big a bump means something from skin test for tuberculosis?
6 doctors weighed in across 2 answers
15mm or....: If the "bump" is bigger than 1.5cm (about 3/4 of an inch)it is considered positive . Also . If blisters are present , the test is considered positive.
Answered 5/4/2014
5.8k views
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Depends: If you are immune compromised or a child, a bump greater than 5mm in diameter is significant. Otherwise, a bump greater than 10mm in diameter is considered significant.
Answered 1/5/2019
5.7k views
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