You can drink alcohol after reading the test results 72 hours after you have done the PPD skin test, so as not to have an effect on the test results by drinking alcohol, which is harmful to your health, and it is recommended to abstain from drinking alcohol. PPD skin test is to inject a pure protein derivative of Mycobacterium tuberculosis into the skin of the inner forearm, and determine whether the organism is infected with Mycobacterium tuberculosis by observing whether the skin appears red, swollen and hard. Generally, the PPD skin test takes 48 to 72 hours to produce the results, so you should not drink alcohol until 72 hours after you have had the PPD skin test. Because some people drink alcohol after PPD skin test, the body allergic to alcohol may appear skin rash, itching and other manifestations, which will have an impact on the PPD skin test results, and will easily lead to errors in judgment. It is recommended to not only avoid drinking alcohol within 72 hours after PPD skin test, but also keep the area clean and dry, and should not touch water to avoid infection at the injection site. In addition, drinking alcohol is harmful to health, it is recommended to develop good living habits, quit smoking and drinking, more practical food rich in vitamins and protein, and appropriate physical exercise.