The lack of milk after delivery may be caused by the baby sucking less, malnutrition, poor mood, abnormal hormone levels in the body, blockage of mammary ducts and other reasons. 1. Less baby sucking: the number of times the baby sucks on the breast after delivery is relatively small, not able to effectively stimulate the secretion of lactin, there may be no milk after delivery, to increase the number of times the baby breastfeeds, let the baby suck on the breast more, may increase the amount of milk. 2. Malnutrition: After giving birth, no attention to nutritional supplementation, excessive dieting may be malnourished, and the amount of water and soup in the diet is relatively small, which may also lead to no milk after giving birth. 3. Poor mood: Postpartum overwork with children, poor physical recovery, lack of family care may be a long time of poor mood, can cause endocrine disorders, postpartum will also have no milk. 4. Abnormal hormone levels in the body: After giving birth to a child, the hormone levels in the female body decline, the hormone decline is not able to balance the regulation, the amount of lactogen discharged is small, postpartum will have no milk. 5. Mammary ducts blockage: post-partum milk stagnation, inflammation and infection of the mammary ducts may cause mammary gland blockage, but also postpartum no milk. There are many reasons why there is no milk after giving birth in the clinic, and in serious cases, you can go to the hospital to check the specific reasons and treat them.