Appendicitis pain six months after surgery may be related to appendiceal stump inflammation, adhesive intestinal obstruction or fecal fistula and other reasons. 1. Appendiceal stump inflammation: when there is intestinal stone residue during appendicitis surgery or when the stump is retained longer than 1cm, the stump may have inflammation recurrence after surgery, which manifests itself as abdominal pain, gastrointestinal symptoms (such as nausea, vomiting, etc.) or fever and other appendicitis symptoms. 2. Adhesive intestinal obstruction: it belongs to the more common postoperative complications, which may be related to postoperative bed rest, surgical injury, incision foreign body or heavy local inflammation, which may lead to lower abdominal pain. 3. Fecal fistula: rare, may be related to intraoperative suture caused by edema and fragile cecum tissue fissure, appendiceal stump ligation line detachment, etc., if the lesion is confined, only in the local pain. It is recommended that six months after the appendicitis operation, still have pain in time to consult the doctor, clear diagnosis and then carry out targeted treatment.