The total amount of blood lost in one menstrual period is called menstrual volume, which should be 20ml-60ml normally. If it is lower than 20ml, it is called hypomenorrhea, which may be caused by endocrine abnormalities or endometrial abnormalities, and may affect the fertility function of women if they have fertility needs. Therefore, low menstrual flow in women is generally a bad phenomenon, and they should go to the hospital in time for sex hormone level measurement, abdominal ultrasound and other related examinations to confirm the cause and then carry out targeted treatment. If the low menstrual flow is caused by organic diseases of the reproductive system, such as uterine adhesions, chronic endometritis, uterine dysplasia, etc., medication or surgery needs to be given to see if the normal menstrual flow can be restored. If endocrine abnormalities, such as polycystic ovary syndrome, hyperprolactinemia, hypothyroidism, etc., can cause hormonal disorders, resulting in scanty, scanty or even amenorrhea, medication can be given under medical supervision to restore normal menstrual flow. In addition, if the low menstrual flow is caused by medication, weight loss, staying up late, etc., the normal flow may be restored after removing the causative factors, such as stopping or changing medication, stopping weight loss and regular sleep. Proper physical exercise should be performed daily to maintain normal weight and body fat percentage to avoid overweight or underweight affecting women’s endocrine function and causing menstrual disorders. It is recommended to develop a good work and rest routine, avoid staying up late, quit smoking and limit alcohol, and maintain a good physical and mental state.