You also should not scratch or rub the test area on your arm. This can cause redness or swelling that may cause the results to be misread. You can apply a cold washcloth on your arm if it is itchy. [4] X Research source
You cannot always see the induration. You must find the induration with your fingertips.
If the mark is between two different lines, use the lower measurement.
HIV received organ transplants been immunosuppressed for various reasons recent contact with a TB positive person chest x-ray consistent with old healed TB end stages of renal (kidney) disease[9] X Trustworthy Source PubMed Central Journal archive from the U. S. National Institutes of Health Go to source
immigrated recently from a country with widespread TB use injection drugs work in healthcare settings, prisons, nursing homes, or other similar areas have clinical conditions that put them at risk, like diabetes, leukemia, low body weight are children under age 4 are children and adolescents exposed to high-risk adults[10] X Trustworthy Source Centers for Disease Control and Prevention Main public health institute for the US, run by the Dept. of Health and Human Services Go to source
Even if you believe your skin test is negative, you must return to the doctor to have it professionally read.