A small amount of blood with a very light color is not necessarily menstruation. It depends on the patient’s menstrual cycle and a detailed medical history to determine whether it is ovulation or menstruation. If it is around the time of ovulation, a small amount of bleeding is normal and does not need to be treated. In clinical practice, a menstrual flow of less than 30 ml is diagnosed as menorrhagia. If it is a menstrual period, the menstrual flow is very small and light in color, the common causes are: i. Decreased menstrual flow due to endocrine disorders, such as polycystic ovary syndrome, hyperprolactinemia and hyperandrogenemia can lead to hypomenorrhea. Second, certain diseases, such as endometrial tuberculosis, can lead to reduced menstrual flow. Third, multiple abortion procedures lead to uterine adhesions, resulting in decreased menstrual flow. To find the cause of menorrhagia, we need to do ultrasound examination, endocrine hormone six examination, hysteroscopy, and treat the symptoms according to the results. It is recommended to scrape the uterus as little as possible, use eusebio to regulate endocrine in time after abortion, prevent uterine adhesions, and actively treat the original disease.