Hard breasts and not being able to express milk may be caused by milk blockage, breast hyperplasia, mastitis and so on, which can be treated by massage, medication, surgery and other methods under the guidance of the doctor. 1. Milk blockage: Due to localized blockage leading to accumulation of milk, you will feel hard lumps in your breasts, and it is not easy to suck out the milk with a breast pump, and there will still be hard lumps in the local area, which can be massaged into the breasts to make the hard lumps subside gradually. 2. Mammary gland hyperplasia: It is mainly caused by endocrine disorders, such as the imbalance of the ratio of estrogen and progesterone, which leads to the proliferation of the glandular tissue of the mammary glands at an incomplete level and the formation of hyperplastic lumps, which can not be squeezed out of the milk, and it can be treated with drugs such as tamoxifen and mastectomy under the direction of the doctor. 3. Mastitis: the disease is mainly due to bacterial invasion of breast tissue through the nipple skin lesions, the formation of inflammatory hard lumps, the appearance of milk can not be squeezed out of the situation, you can use penicillin, cefradine, erythromycin, metronidazole and other drugs for treatment, but also through the operation, such as abscess incision and drainage, and ultrasound-guided puncture and drainage. It is recommended that patients go to the regular hospital in time, under the guidance of the doctor, according to the patient’s specific condition performance, to take targeted treatment, life should pay attention to breast cleaning.