During menstruation, the uterus will be congested with blood, so women’s qi and blood mainly go down to the uterus, resulting in a relative lack of blood supply to the brain, so there will be a lack of oxygen to the brain, resulting in drowsiness, or generalized fatigue and other clinical symptoms. This means that the patient’s body is relatively weak and cannot compensate for this blood loss. If the patient’s body is usually strong, the body will have a compensatory mechanism during menstruation, and the hematopoietic function will be stronger, so the symptoms of drowsiness will not appear. When a woman is sleepy during menstruation, it proves that the patient’s body is relatively weak and needs to be regulated. According to the patient’s clinical symptoms, you can choose to use the Four Substance Soup, Eight Treasures Soup or Jianzhong Soup to treat the patient with medicines that benefit the qi and nourish the blood, strengthen the spleen and tonify the kidneys.