If i scratch a TB skin test or sleep on it?

Question

What will happen if you scratch or sleep on a TB skin test?

Answer 1

Is it itchy, and that's why you are scratching? If yes than you may have TB! If you just scratched it by accident or slept on it, your fine. If the test is going to turn out negative, it will be a tiny injection dot by 12 hours!

Answer 2

if you scratch it you will irritate it, possibly make it difficult to be read and perhaps have to have it repeated. sleeping on it should not be a problem