I’m a little worried I got a tb test for work and there is not bump it’s just flat. I don’t know if this is a good or bad sign or if it’s a bruise?

I’m a little worried I got a tb test for work and there is not bump it’s just flat. I don’t know if this is a good or bad sign or if it’s a  bruise?
I’m a little worried I got a tb test for work and there is not bump it’s just flat. I don’t know if this is a good or bad sign or if it’s a bruise?
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