The most likely cause of a meatball in the anal area after hemorrhoid surgery is edema of the incision. Edema is a congestion and bulging of the anal canal and anal edge skin, which can cause swelling and painful symptoms, and can be checked by the doctor when he or she changes the medication. It occurs because: 1. There are incisions and traumas around the anus after surgery, and the incisions and traumas originally have normal blood circulation and lymphatic circulation. After the incision and trauma, some blood circulation and lymph circulation are blocked, circulation is impaired, the osmotic pressure of blood vessels increases, and too much water is stored in the interstitial space of tissues and causes edema; 2. If there are difficulties in defecation, longer squatting toilet time or stimulating factors such as dry stool, it will lead to the aggravation of edema. After surgery, you can take oral medications that promote venous and lymphatic fluid reflux, you can use topical hemorrhoid creams and suppositories, or lotions, sitz baths and fumigation, and local physical therapy can improve local microcirculation and promote wound healing. Edema will gradually eliminate as the incision slowly heals, and most of it can be basically restored to normal skin. If the edema is large and cannot be completely eliminated or affects the wound healing, it can be reviewed by a doctor and removed under local anesthesia if necessary.