The inability to express milk may be caused by physiological factors, blocked milk ducts, etc. Women with physiological factors can consume more protein-rich food, which is conducive to the secretion of milk; blocked milk ducts should use negative pressure suction to alleviate the symptoms. 1. Physiological factors: Breastfeeding women have low milk secretion due to dietary factors, endocrine disorders, emotions and other factors, resulting in the symptom of not being able to express milk. Patients should consume more foods rich in vitamins, proteins and calcium under the guidance of the doctor, which is conducive to the secretion of milk. 2. Mammary duct blockage: Breastfeeding women fail to discharge milk in time, resulting in the blockage of the mammary ducts and the symptom of not being able to squeeze out milk. Under the guidance of the doctor, patients can use negative pressure suction, massage, hot compresses for treatment, which can improve the symptoms of blocked mammary ducts. In addition, certain breast diseases can also lead to the blockage of the milk ducts, breastfeeding women who have long been unable to express milk, should go to the hospital for diagnosis, to identify the specific causes of the disease, and then choose the appropriate method of treatment under the guidance of the doctor.