Gauze insertion pain 20 days after perianal abscess surgery may be due to purulent lesions caused by bacterial infection of the soft tissues of the perianal abscess anus. Perianal abscess gauze strips are usually left in place for 1-3 days, depending on the size of the abscess cavity and its depth. When the abscess is deeper and its scope is wider, oil gauze strips need to be placed in the deeper part for the purpose of drainage in order to smooth out the drainage and avoid the superficial tissues healing while the deeper tissues are not healing, thus forming the phenomenon of deep infection and pus accumulation again. However, the oil gauze can be removed when the patient starts to take a sitz bath when the effect of the treatment is stable. If it is painful to insert gauze 20 days after perianal abscess surgery, you should go to the hospital for follow-up in time, and according to the doctor’s instruction, carry out anti-infective treatment and regular medication change, and pay attention to observing the changes of the wound.