Tummy bulge after appendiceal mucinous tumor surgery may be caused by wound infection, intestinal adhesion, incisional hernia and so on. 1. Wound infection: if the incision is infected by staphylococcus and other bacteria after surgery, it can cause localized suppurative inflammatory reaction, resulting in bulging stomach. 2. Intestinal adhesion: If the surgery is complicated by intestinal adhesion, it can cause intestinal obstruction and abdominal bulge. 3. Incisional hernia: hernia occurring at the incision of the anterior abdominal wall after surgery can be manifested as a bulge in the stomach, which can be accompanied by abdominal pain, abdominal distension and other symptoms. It is recommended that after surgery for appendiceal mucinous tumor, patients should go to the hospital in time to clarify the cause of the disease and carry out standardized treatment under the guidance of the doctor, so as not to delay the condition.