Periodontal flap surgery is performed under local infiltration anesthesia or conduction block anesthesia and the procedure is painless. After the surgery, there will be more or less painful sensations and symptoms. Periodontal flap surgery is a kind of specialized surgery to treat periodontal diseases, which mainly involves removing part of the periodontal pockets, as well as the inner wall of the pockets, and turning up the mucosal tympanic flap of the gingiva, scraping away the tartar and the proliferated granulation tissue under direct vision, and rinsing it with saline, and then resetting the gingival flap and sewing it up, so as to achieve the purpose of eliminating the pockets, or making the pockets shallower, and promoting the bone restoration. The surgical process needs to be carried out under anesthesia, so the surgical process is painless, after the surgery, there will be some pain and swelling after the anesthetic metabolism is completed. Periodontal flap surgery needs to go to a regular hospital for treatment, and after the surgery, follow the doctor’s instructions to disinfect on time to prevent infection.