Spasmodic pain in the right lower abdomen may be caused by appendicitis, intestinal obstruction, ureteral stone and other diseases. 1. Appendicitis: appendicitis is mainly caused by the blockage of the appendix lumen, bacterial invasion and other factors. Patients may have pain in the right lower abdomen, accompanied by anorexia, nausea, vomiting, diarrhea, fatigue, high fever and other symptoms. 2. Intestinal obstruction: Intestinal obstruction may be caused by intestinal adhesion, intestinal lumen blockage, intestinal blood flow obstruction and other factors. Patients may have abdominal pain, nausea, vomiting, abdominal distension, anal stop defecation and other symptoms, and some patients may have spasmodic pain in the right lower abdomen. 3. Ureteral stones: Ureteral stones are mainly caused by kidney stones staying in the ureter in the process of discharge. If the lower part of the ureter stones, can appear in the right lower abdominal pain, which is a kind of pulling pain, often accompanied by urinary urgency, urinary pain, urinary frequency and other symptoms. There are many other causes of spasmodic pain in the right lower abdomen, such as ovarian cyst tip torsion in women, intestinal spasm and so on. It is recommended that the patient go to a regular hospital for a relevant examination, and then follow the doctor’s instructions to be treated accordingly.