After the operation, most people will use drugs according to the doctor's advice, such as potassium permanganate. However, what most people often lack and neglect is anal care, specifically, washing after defecation, sitting ventilation, fumigation and sitting bath to ensure a 20-minute course of treatment once a day (you certainly didn't do it, which is the root cause of the lump not disappearing and the abscess recurring).
However, it is not easy to do this. It is necessary to prepare an anorectal rehabilitation bag, which contains a hand-held washcoat to help clean after defecation (to ensure the cleanliness after defecation), an anal hydrotherapy instrument to help put it on the toilet to fumigate and bathe, to promote the edema to subside (it usually takes several minutes to squat on the ground, which does not play the role of medicine), and a painless breathable pad to help the suspended wound to promote healing (this is particularly important, because it is easy to break due to high friction pressure, and the wound is difficult to be airtight).