1. Complications of the incision include incisional infection, chronic sinus tracts and incisional hernia, mostly due to contamination of the incision during surgery. Gangrene or perforated appendicitis is particularly likely to occur. Most incisional infections occur 3 to 5 days after surgery, but also after 2 weeks. The main manifestation is that the patient’s body temperature continues to rise or falls and then rises again 3 to 5 days after surgery, feeling painful wound, redness, swelling and tenderness of the skin around the incision, and even pus flowing from the incision. At this time, the sutures should be removed immediately, the wound should be fully drained, the necrotic tissue should be removed, the dressing should be changed, the wound should be healed, and the second stage of suturing should be performed when the granulation in the wound is fresh. A small number of patients may later develop chronic sinus tracts and incisional hernias, which can be reoperated at an optional stage. 2, intra-abdominal bleeding Mostly due to inadequate hemostasis of the appendiceal tract during surgery or loosening of the vascular ligature. The main manifestations are pallor, rapid pulse, cold sweat, abdominal pain, abdominal distension, and even shock symptoms such as blood pressure drop. The patient should be immediately made to lie down, sedated, oxygen inhalation, intravenous fluids, and cross-matching blood to prepare for surgical hemostasis. 3, abdominal residual abscess After appendectomy for gangrenous or perforated appendicitis, abdominal pus is not completely absorbed, and residual abscesses can be formed in different parts of the abdominal cavity. Pelvic abscess is the most common, mostly occurring 5 to 10 days after surgery, mainly manifesting as persistent high fever, abdominal pain, abdominal distension, accompanied by a feeling of urgency, anorectal finger examination reveals relaxation of the sphincter and bulging of the anterior rectal wall. Attention should be paid to semi-recumbent drainage to allow secretions or pus to flow into the pelvic cavity and alleviate the poisoning phenomenon. Also strengthen antibiotic treatment. If no improvement is seen, drainage surgery is recommended. 4. Appendiceal stump inflammation The appendix is not completely removed at the appendiceal root during appendectomy, and a small part of the appendiceal root remains, causing the basic cause of appendicitis, and the appendiceal cavity obstruction is not eradicated. Patients may experience a recurrence of appendicitis after surgery. If appendicitis is present, it can be treated conservatively, but if it recurs, the remaining appendiceal roots need to be removed surgically again. 5. fecal fistula Causes of fecal fistula: (1) gangrenous or perforated appendicitis in which the appendiceal stump is ulcerated, and improper surgical treatment of the appendiceal stump. (2) The ligature of the appendiceal stump is detached. (3) Injury to the cecum and ileum during surgery. Fecal fistulas are usually colonic fistulas, usually confined to the right lower abdomen around the cecum, and rarely form diffuse peritonitis. The patient’s body temperature is usually not very high and the nutritional deficit is not severe. Most of them heal spontaneously after antibiotic treatment. If the disease has not healed for more than 3 months, it should be treated by surgery again. 6.Adhesive intestinal obstruction is related to the severity of the patient’s intra-abdominal inflammation, surgical injury, foreign body irritation and so on. Generally, comprehensive conservative treatment should be given first, and surgery should be performed when it is ineffective.