Perianal abscess surgery drainage black line about half a month or so can be removed, need to be based on the patient’s actual condition to decide. After the surgery of perianal abscess, placing the drainage black line is to drain the pus in time, it needs a longer time to ensure that the pus is completely eliminated, want to make the pus completely eliminated, it takes about two weeks to four weeks or so, the drainage process black line needs to be replaced diligently, so as to avoid secondary infection or false healing of the wound, and the drugs need to be replaced regularly. After the surgery, you need to ensure that the wound area is clean and dry to prevent bacterial infection, and you can eat more food rich in vitamins and proteins in your diet, which can promote the recovery of the wound. After the operation of perianal abscess, follow the doctor’s instructions to change the medicine regularly, and if the perianal wound has any abnormal manifestation, you need to consult the doctor in time to give treatment.