One month after appendicitis surgery, the right lower abdomen still hurts, consider surgery-related factors or non-surgery-related factors. 1. Surgery-related factors: mainly refers to post-surgery complications. (1) Adhesion-type intestinal obstruction: mainly due to the patient’s inflammatory attack when the inflammatory material exudes damage to the mucosa of nearby viscera, surgical operation can also damage the mucosa of nearby intestinal wall, postoperative prolonged bed-ridden and lack of activity, so appendicitis patients are often recommended to laparoscopic appendectomy to reduce the damage to the mucous membrane of the intestinal wall, and get out of bed as soon as possible. (2) Appendiceal stump inflammation: mainly due to the end of the appendix is retained too long or when the appendix has intestinal stone residue. (3) Fecal fistula: relatively rare, causes include dislodgment of the appendiceal ligature as well as edema occurring in the cecal tissue. 2. Non-surgical correlates: common in patients with other conditions that cause pain in the lower right abdomen, such as Crohn’s disease and amoebic enteritis. Patients who still have lower right abdominal pain one month after appendectomy should be reviewed on an outpatient basis.