Conversation: The conversation between human and AI assistant.
[|Human|] Hello.I am from a different country, so my PPD is always positive. I just found out that my recent chest Xray was abnormal; they will not tell me anything over the phone. All I know is that I need to go in tomorrow to get another PPD test done. I dont understand. I thought the bump and redness increase each time when positive. Can you please explain? Thank you!
[|AI|]  First thing is that any X-ray abnormality needs to be evaluated. The best test is to see if you have a previous X-ray and compare. If it is a new abnormality then further testing needs to be done. If your PPD was clearly positive then tell them, and it may not benefit to repeat a PPD. But sometimes it is mildly positive, and it becomes more positive later, in that case it may help. But do tell your doctor that your PPD is positive.