Ovulation is the middle of the normal menstrual cycle, the period when the egg is expelled from the ovary. Most women have no obvious symptoms during ovulation. There are also individual women who experience pain in the lower abdomen during ovulation, the causes of which are mainly in the following categories. First, ovulation pain. Before the egg is discharged from the ovary, the follicle located on the surface of the ovary first ruptures and then the egg can be discharged. Some women experience pain in the lower abdomen when the follicle ruptures. This can cause pain in the lower abdomen, but it is important to note that the pain is mild, and some women only experience discomfort in one side of the abdomen. The pain is also short-lived and sometimes paroxysmal. In this case, no special treatment is needed, just observe the nature and duration of the pain. Second, rupture of the corpus luteum of the ovary. When the ovaries finish ovulating, the follicles gradually develop into corpus luteum. In some women, after ovulation, the local rupture bleeds continuously, which causes pain in the lower abdomen. This pain is usually more intense, intolerable to the patient and lasts for a longer period of time. As the bleeding increases, the blood will continue to form pelvic fluid in the rectal fossa of the patient’s pelvis, and the patient will experience a feeling of stooling under the stimulation of the pelvic fluid. In conclusion, abdominal pain during ovulation is mainly caused by the rupture of the follicle and ovulation.