The following are the main clinical causes of discomfort during ovulation: First, after ovulation, the corpus luteum is formed and there is a small amount of bleeding inside the corpus luteum, due to individual differences, some people have relatively more bleeding and some people have relatively less bleeding. Close clinical observation and proper rest are recommended, and the discomfort will often be relieved as soon as possible. Secondly, due to chronic pelvic inflammatory disease in the past, if the follicular fluid flows into the rectal fossa after ovulation, the stimulation may also cause discomfort in the lower abdomen. It is recommended to do a gynecological examination to find out if there is pressure pain in the uterine adnexa and pressure pain in the sacral ligaments to find out if ovulation discomfort is caused by pelvic inflammatory disease.