Ok here is the deal, I am a health specialist, just came into the sector. Previous job was in administration in the corporate world. I took a TB test, and so did my wife who works for the same hospital. Her test site in less then three hours only showed a small needle mark where the skin test was applied. Mine went up into a blister site about around as a quarter. In 48 hours the area was red and not as swollen as prior. It had some swelling in the area and still the size of a quarter. The area did not exhibit a huge raised bump. The bump actually was not really raised, but laid under the skin. It was red as stated the size of a quarter, with the swelling under the skin with a slight swelling above the size smaller then the redness, which was quarter size. The LPN checked it, felt the swelling and gave me a negative. In 72 hours the site looked better then 48 hours. Less swelling, less redness. I have looked and been told that is it is positive there will be swelling the size of a dime, how high is the swelling to be, and what else should there be. I am afraid this LPN may of read it wrong. I have not been around anyone with TB. I have never been tested prior. As stated my wifes test was negative, her area looked like nothing. I heard the area should of had what looked like a wheel around it, what should I do if I believe this LPN did not know how to read the test??? I have no problems breathing, no symptoms, so what is negative what is positive??? I am confused. I heard the size of a dime with even the slightest raised area is positive. How much swelling should there be???