Ovulatory bleeding does not affect the timing of the next period. Ovulatory bleeding is caused by a brief drop in estrogen levels in the body during ovulation, which results in a small amount of vaginal bleeding due to exfoliation of part of the endometrium, usually lasting 3-7 days. The amount of bleeding is less than the amount of menstruation and may be accompanied by pain or discomfort in the abdomen. Occasional ovulatory bleeding has little to no adverse effect on the body and has no impact on the normal menstrual cycle and does not require treatment. Most of them are related to excessive fatigue or a decrease in the body’s immune system, which affects the endocrine level. However, ovulatory bleeding needs to be differentiated from cervical diseases, endometrial polyps and endometrial lesions. When non-menstrual bleeding occurs, patients should have gynecological internal examinations and pelvic ultrasound examinations, and cervical cancer screening if necessary, to exclude the possibility of the above-mentioned lesions, and women with irregular menstruation should also exclude the possibility of dysfunctional uterine bleeding.