If a wound is infected with pus, you should not use Yunnan Baiyao in this case. The cause of septic infection in wounds is mostly due to foreign bodies in the wound or improper wound treatment, resulting in septic infection. Under normal circumstances, the correct treatment is to clean the wound, remove all the dirt from the wound, rinse it repeatedly with saline and hydrogen peroxide, disinfect it with iodophor, dress it with sterile gauze, and place drainage strips routinely to keep the drainage open. At this point, if the wound is not drained properly, the infection will be aggravated, so you should not use Yunnan Baiyao for septic infections. After the wound has been drained, antibacterial medications, including oral cephalosporins, should be used to treat the infection. It is important not to drink alcohol while taking cephalosporins to avoid disulfiram-like reactions due to alcohol consumption. Pay attention to a light diet. Change the medication regularly, go to the hospital every 1-2 days or so, and observe the changes in the wound.