Sorry! What I meant to say was ...is it safe to take another ppd skin test if the first one was POSITIVE? I've had one done about 6 years ago and my skin was very irritated. I've had chest xrays and I'm okay. BUT, I'm applying for another job and they require the measurements of the rash that I had got on my arm. (I am not able to obtain this information from my previous medical group). So, now they want me to have it done again and I'm nervous on what reaction my skin might have this time.