The low milk flow is related to emotional stress, improper diet and low postpartum prolactin secretion, and the reduction of milk is related to hormones and hypothalamic regulation. Depressed mood during breastfeeding will stimulate the secretion of adrenal glands to reduce blood flow, which will prevent nutrients and hormones from entering the breast, so there will be less milk. By avoiding mental stress, it can play a role in promoting lactation. Diet during breastfeeding is also very important. In summer, many people like to eat cold drinks because of the hot weather, and eating cold food can affect lactation. When nutrients can not reach the breast will affect the secretion of milk, while eating chilled food during lactation will also lead to diarrhea in the baby. Due to endocrine disorders, emotional stress and lack of sleep after childbirth, the lactogen content in the body will be low, the human body’s lactogen is endocrine regulation, when the mood is bad endocrine changes will affect the secretion of milk, so that milk gradually decreased.