Tuberculosis Skin Test Allergy Symptoms

TB skin test allergy symptoms are mainly the following points: 1, the skin test injection site is normal in the affected side of the left forearm, the patient's left forearm flexor side of the middle intradermal injection 0.1 ml. After the skin test is done, you need to draw a circle around the skin, so that you can compare with the original skin mound 48 to 72 hours later. 2, the judgment of negative results can be checked after 48 to 72 hours, otherwise it is inaccurate skin test results judgment. 3. Weak positive judgment: 48 to 72 hours later, measure the diameter of the induration on the skin with a ruler at the place where the skin test was done. If the diameter of the skin mound is found to be between 5 and 9 mm, then the skin test result can be judged as weak positive. 4. The judgment of positive results is also to measure the diameter of skin induration with a ruler after 48 to 72 hours. If the diameter is found to be between 10 and 19 mm, it can be judged as a positive result. 5. The judgment of strong positive results. If the diameter of the same skin mound reaches or even exceeds 20 mm or there are local symptoms such as blisters and skin necrosis, then such tuberculosis skin test results can be judged as strong positive results.