What causes pain in the lower right abdomen?

Pain in the right side of the lower abdomen may have various causes, mainly including: 1. Appendicitis: The appendix is located in the right lower quadrant of the abdomen. A typical symptom of appendicitis is migratory right lower quadrant abdominal pain, which may be accompanied by loss of appetite, abdominal distension, and other symptoms. 2. Colitis: Colitis may be caused by bacterial infection, immune factors, etc., and presents with symptoms such as right lower abdominal pain, diarrhea, and bloody stools. 3. Gynecological inflammation: In females, gynecological inflammations such as pelvic inflammatory disease, oophoritis, salpingitis, etc., may cause pain in the right lower abdomen. 4. Urinary system issues: Urinary system stones, inflammation, and other conditions may also cause pain on the right side of the lower abdomen. 5. Other digestive system diseases: Conditions such as gallstones, chronic cholecystitis, duodenal ulcer, and colonic obstruction can similarly present with pain on the right side of the lower abdomen.