Normally there is no hard lump in the breast. Normally there is no hard lump in the breast, patients who have hard lumps in the breast, it is recommended to go to the regular hospital to do ultrasound examination for clear diagnosis. It may be the manifestation of some diseases, such as mastitis, breast fibroid, breast cancer and so on. During the breastfeeding period, especially one week after giving birth, the milk secretion is vigorous, and the baby sucks less, which will lead to the milk blockage clogged in the breast, forming lumps and hard lumps, and in serious cases, leading to mastitis, which requires timely dredging of the milk ducts. Non-nursing women, breast lumps may be breast fibroid or breast lobular hyperplasia, this disease is benign, it is recommended to timely treatment to avoid the development of breast cancer. Breast lumps, it is recommended to do a good job of dynamic observation at any time, regular review of mammography, and develop good lifestyle and dietary habits.