There are several different cases of low menstrual flow: 1) endocrine disorders, which may cause the endometrial lining to be thin due to low estrogen levels in the body, resulting in low menstrual flow. 2) problems such as weakened ovarian function, which may directly affect the growth of the endometrial lining, resulting in low menstrual flow. 3) problems such as weakness and anemia, which may result in poor blood flow and reduced bleeding when menstruation occurs. The problem is caused by weakness and anemia. Because of the poor physical quality of women, when menstruation comes, there may be poor blood flow and reduced bleeding. It is necessary to take blood tonifying and blood activating drugs for treatment in time. 4. It may be caused by problems such as uterine adhesions, cervicitis or other gynecological diseases, and it is recommended to have ultrasound examination for symptomatic treatment in time.