Many patients ask, “What causes lobular hyperplasia in the breast? How can I get mastocytosis? The normal physiological changes of the breast are regulated by estrogen, progesterone and pituitary hormones. The normal physiological changes of the breast are regulated by estrogen, progesterone and pituitary hormones. If the menstrual cycle is influenced by exogenous hormones or stressful life events, it may cause an imbalance in the levels of these three hormones and disrupt the mutual control, resulting in excessive hyperplasia of the lobules and ducts of the mammary glands. Therefore, the usual diet, cosmetics, and regular life are important for women’s breast.