The causes of round hard lumps in the middle of the breast are many and varied and are analyzed as follows: 1. subcutaneous lymph nodes, lymph nodes are stimulated by inflammation resulting in enlargement and pain, forming hard, round, hard lumps that can be moved, which can be removed orally by anti-inflammatory drugs or infusion to reduce inflammation, and then surgically. 2. breast hyperplasia, the hard lumps in the patient’s breasts are tough in texture, not connected to the surrounding tissues and can be moved. The tumor is often single, but a few are multiple, and will increase rapidly during pregnancy and lactation, affecting the beauty of women.