The lack of milk can be caused by clogged milk ducts, mastitis, breast cysts and so on. Blocked milk ducts can be treated with massage and hot compresses, mastitis can be treated with antibiotics, and breast cysts need to be surgically removed. 1. Breastfeeding ducts are clogged, which can be caused by the accumulation of milk and other factors, and can be treated with massage and hot compresses, which can promote the unblocking of the breasts through massage, and hot compresses can promote the blood circulation of the breasts and alleviate the symptom of the lack of milk. 2. Mastitis: Breastfeeding mastitis is most common in post-partum breastfeeding women, and can be treated with antibiotics such as penicillin and penicillinase-resistant benzathine sodium. 3. Mammary cysts: these are occlusions of the lobes and lobules of the mammary gland, the small ducts and the terminal ducts due to various reasons and need to be surgically removed for treatment. There may be other reasons why the milk does not flow, so it is advisable to go to the hospital in time, improve the examination and clarify the cause of the disease, and then carry out standardized treatment under the guidance of the doctor.