My arm is red and swollen after my TB skin test. That's not normal.

After finishing the tuberculosis skin test, there is redness and swelling of the arm, which needs to be combined with the size of the redness to determine whether there is any abnormality. Usually, the size of the skin redness is less than two centimeters, which is a normal phenomenon, but the skin redness after the skin test is more than two centimeters is an abnormal phenomenon.