Patients with appendicitis, 20 days after the operation, also showed pain in the right lower abdomen, seen in the following reasons: first, the symptoms of appendiceal infection is more serious, mainly in patients with suppuration, perforation, gangrenous appendicitis, but also in some patients with periappendiceal abscess, complicated by diffuse peritonitis. In this case, it is easy to complicate the infection of the incision, fat liquefaction, and also easy to induce hyperplasia of the postoperative incision scar. Therefore, pain in the incision is a very common manifestation. And if it manifests as pain in the abdomen, intra-abdominal pain, not except after infection, combined with the occurrence of intestinal adhesion, you should pay attention to the diet structure, avoid overeating. Secondly, the most common complication is appendiceal stump inflammation, which is caused by retaining the appendiceal stump too long and secondary infection, and requires systematic anti-infective treatment, and if necessary, may also need to undergo another surgical treatment.