Indications: 1. Superficial abscesses with existing fluctuations. 2.Deep abscesses with pus confirmed by puncture. 3.Abscesses in the floor of the mouth, cellular weave, hand infection and other special sites should be operated before the pus has gathered into an obvious abscess. Operation method: 1.Regular local disinfection and local anesthesia along the incision. 2.The incision should be extended with a sharp knife into the center of the abscess cavity toward both ends, and if the abscess is not large, the incision should preferably reach the edge of the abscess cavity. 3.After cutting the abscess cavity, reach into it with your finger, and if there is interval tissue, you can gently separate it into a single cavity to facilitate pus drainage, and you can also cut at both sides of the abscess cavity to do counter-oral drainage. 4.For deep abscess, puncture and aspiration with needle before incision, and after finding the abscess cavity, leave the needle in place as a sign of incision, first cut the skin and subcutaneous tissues, then follow the direction of the needle, bluntly separate the muscle layer with hemostatic forceps, and after reaching the abscess cavity, cut it fully, and examine it with fingers sticking into the abscess cavity. 5.After the swelling is cut, the whole abscess cavity is filled tightly with petroleum jelly gauze in order to compress and stop bleeding, and after gently removing all the filling dressing 2 days after the operation, the antibacterial gauze is changed.