Traditional Chinese Medicine believes that the nutrients in the breast milk are the direct source of the period. This can be proved by two observations. One is that a mother does not have a period when doing baby breastfeeding due to the milk given to the baby. The other is that most women experience the fullness and bloating of their breasts before their periods come. They feel released from the situation after the ending of their periods. From this point of view, the flow of milk nutrients through meridians to the ovary and uterus is crucial to avoid diseases. If the milk nutrients are not totally going down to the ovary and uterus and get deposited in the breast, combining with qi and blood stagnation, the breast lumps or cancer can be developed. If the breast milk reverts, the milk nutrients will be accumulated in other organs. This may cause other health problems or cancers in the future. Some of the cancers include lupus, liver cancer, leukemia, lymphoma, and lung cancer.