Patients who have no milk but painful breasts after delivery may be related to factors such as sticky colostrum, mastitis, and malformed milk ducts. 1. Thick colostrum: As colostrum is sticky, some inexperienced women who have given birth to newborns do not consume enough water and do not breastfeed in time, which leads to further concentration of colostrum in the breasts, and the sticky colostrum cannot be discharged through the narrow mammary ducts, which leads to breast pain after giving birth to no milk. 2. Mastitis: Mastitis is an inflammation of the breast tissue, when the patient due to bacterial invasion of lymphatic vessels caused by breastfeeding mastitis, may cause postpartum no milk but breast pain, some patients may also be accompanied by fever, hard lumps in the chest and so on. 3. Breast Duct Deformity: When a woman has congenital breast duct deformity, the breast ducts are twisted or narrowed by nature, it may cause the breast ducts to be not smooth, so the secreted milk can not be discharged from the breast ducts in time, and the situation of having no milk but breast pain after delivery may occur. In addition, patients with papillary tumors in the nipple ducts or some inverted nipples may also experience such conditions. It is recommended that the patient should consult a doctor for examination to clarify the cause of the disease and then carry out targeted treatment, try to eat a light diet, eat more fresh fruits and vegetables, and use warm water to apply hot compresses on the breasts to relieve the symptoms if necessary.