Breasts are scratched usually do not have hard lumps, there are hard lumps may be physiological lumps, breast hyperplasia, breast nodules and so on. 1. Physiological lumps: If you are in pubertal development, the level of estrogen may increase continuously, and the appearance of hard lump-like changes in the breast may be a normal physiological phenomenon. 2. Breast hyperplasia: this disease is mainly related to endocrine dysfunction, the patient’s estrogen and progesterone ratio is imbalanced, resulting in excessive proliferation of the breast parenchyma and incomplete recovery, resulting in different degrees of hyperplasia in each part of the breast, which leads to the appearance of the patient’s breast with hard lumps. 3. Breast nodule: when the patient’s breast is infected, damaged, endocrine hormone level disorders, gene mutation, environment and other factors, it will lead to the phenomenon of hard lumps in the breast. If the patient has other uncomfortable symptoms, it is recommended that the patient go to the regular hospital in a timely manner, under the guidance of the doctor, according to the patient’s specific condition, to take targeted treatment.