The causes of right side abdominal pain in patients with menstruation include pelvic bruising, inflammation, cold and cold in the body, and primary disease attacks, etc., as follows: 1. pelvic congestion, bruising: because women’s pelvic congestion and bruising during menstruation induce swelling of the right side abdominal tissue, and produce right side abdominal pain; 2. inflammation: because women’s right side abdominal adnexitis and pelvic inflammatory disease attacks during menstruation produce right side abdominal pain symptoms; 3. 3, cold, cold: during menstruation, the patient is weak, in a state of blood loss, bleeding, and cold, cold may trigger the right side of the abdominal pain; 4, the onset of primary diseases: women in a state of bleeding, blood loss and weak, the right abdominal primary diseases suddenly onset, such as right cystitis, urethritis, inflammation of the right ureter, or ureteral calculus triggered right abdominal pain.