The main reasons for the lack of milk are related to blocked milk ducts, psychological stress, lack of nutrition, and pregnancy during breastfeeding, etc. Generally, you need to choose the treatment plan according to the specific reasons. 1. Clogged ducts: Mastitis or other causes of clogged ducts will affect the flow of milk, resulting in the absence of milk. It can be accompanied by breast swelling and pain. 2. Excessive psychological pressure: Some women have a lot of psychological pressure during breastfeeding, such as anxiety or depression, which can easily affect the secretion of lactation, thus leading to the phenomenon of no milk. 3. Lack of nutrition: During the breastfeeding period, women need to supplement a lot of nutrients, if the usual intake of nutrients is insufficient, resulting in malnutrition, which will affect the formation of milk, resulting in the phenomenon of no milk. 4. Pregnancy during breastfeeding: Some women do not take proper contraceptive measures during breastfeeding and become pregnant again, which will easily lead to the rise of estrogen in the body, so it will affect the secretion of lactin, resulting in no milk. During the breastfeeding period, pay attention to strengthen nutrition, maintain regular habits and a good state of mind, should let the baby suck on the nipple, can stimulate milk secretion, if there are obvious abnormalities, to seek medical treatment in a timely manner.