The causes of lobular hyperplasia of the breast are mainly related to three factors: first, endocrine hormone disorders, the development of the mammary gland mainly depends on the ratio of estrogen and progesterone. When estrogen and progesterone are disturbed due to certain reasons, it will lead to dysregulation of breast parenchyma hyperplasia and degenerative changes, thus leading to lobular hyperplasia. Second, due to the uneven distribution of estrogen and progesterone receptors in the breast tissue, when the endocrine hormone balance is stable, the local proliferation of the breast is uneven, resulting in bead-like hyperplasia. Third, dietary factors. If you eat a lot of fried and high-fat food for a long time, it can lead to a decrease in the sensitivity of the hormone transporter protein in the body, and a decrease in the ability of the breast receptor to combine with hormones, which will lead to lobular hyperplasia of the mammary gland. In conclusion, the exact cause of lobular hyperplasia is not yet clear. When suffering from lobular hyperplasia, one should actively seek medical treatment to alleviate the clinical symptoms.