There are several conditions of lower abdominal pain: i. Pelvic inflammatory disease can lead to lower abdominal pain. Second, ectopic pregnancy, which may also lead to pain on one side of the lower abdomen. Third, ovulation pain, which may be felt in the lower abdomen during ovulation. Fourth, it may be dysmenorrhea. If lower abdominal pain occurs before or after menstruation or during menstruation, it may be caused by dysmenorrhea. Which cause of lower abdominal pain should be identified. If the pain is caused by ectopic pregnancy, the value will be elevated when the blood HCG is checked and no gestational sac is seen in the uterus by ultrasound. If the lower abdominal pain is caused by pelvic inflammatory disease, there will be pressure pain in the uterine body or both adnexa during gynecological examination, and there may be a mass or fluid in the pelvis during ultrasound. If the lower abdominal pain is caused by dysmenorrhea, after excluding ectopic pregnancy, the menstrual pain may be caused by dysmenorrhea. If the lower abdominal pain is caused in the middle of two periods and the pain is not severe, it may be ovulation pain caused by ovulation.