General question about TB t..

Ok, just a question. When you get your TB test done there is a "bump" just below your skin. Should that "bump" stay there or should it sort of disappear after 2hrs. thanks

When the medication is put in, it makes what is called a "bleb" that is a small raised area.. that should go down pretty fast.. if you have a positive tb test, the area around where the medication went in will become red and a little swollen (greater than 10mm across is considered positive)... the test should not be read, however, until 48-72 hours after administration... also, if it is positive, it doesn't necessarily mean you have it, just that you have been exposed to it... a chest xray will have to be done to diagnose the actual disease.. hope this helps a little...

it depends on your level of reaction... if it grows to a significant size, then you may test positive (it will also usually be red)... if it is just a bump, don't sweat it... that's why they wait 48 hours to check response.