If there is still pus 35 days after drainage of perianal abscess, it is considered to be pseudo-healing of the incision, non-healing of the incision and formation of anal fistula, which needs to be actively dealt with. 1. If the drainage of perianal abscess is not smooth, it may cause pus to gather around the anus, forming the phenomenon of healing of the anus surface and the deeper tissues are not healed, that is, the pseudo-healing of the incision, so there will be pus 35 days after the drainage operation. 2. For some patients, due to individual differences, the incision healing time is too long, there will be 1 month after the formation of pus. 3. If the patient in the perianal abscess drainage surgery did not remove the primary infected lesion, in the drainage surgery will form between the surgical incision and the primary infected lesion of the pipe, called anal fistula, there will be constant pus secretion oozing. It is recommended that patients go to the hospital in time for examination, to clarify the cause of the disease, follow the doctor’s instructions to be actively treated, to avoid postoperative prolongation, bringing adverse consequences to the body.