Pain one year after appendectomy may be caused by intestinal obstruction, other intestinal diseases and appendicitis. 1. Intestinal obstruction, if there is still pain in the affected area after appendectomy, it is considered to be due to the intestinal obstruction caused by local adhesion after surgery, which may be complete or incomplete obstruction, and when it is serious, besides the pain, there will be gastrointestinal symptoms such as nausea, vomiting and abdominal distension. 2. Other intestinal diseases, in itself with Crohn’s disease, ulcerative colitis, or even intestinal tumors and other diseases, may also appear in the right lower abdomen appendix pain. 3. Appendiceal stump inflammation, recurring pain in the appendix in the lower right abdomen may also be caused by re-emergence of inflammation in the appendiceal stump. One year after appendectomy, appendiceal pain, serious cases are recommended to consult with regular hospitals to give clear diagnosis and treatment as soon as possible to avoid delaying the condition.