There are many misconceptions and misinterpretations about lobular hyperplasia of the breast. Breast hyperplasia is not a single disease clinically or pathologically, but a combination of multiple changes with multiple names, such as cystic breast hyperplasia, lobular hyperplasia, and fibrocystic breast disease. Clinically, they are often characterized by breast pain or benign nodules alone or simultaneously, which may fluctuate with the menstrual cycle; pathologically, they are multiple manifestations of breast dysstructure. Clinical and autopsy findings indicate that almost all adult women have these clinical or pathologic manifestations, and even among women without any breast symptoms, up to 90% still have the corresponding pathologic manifestations. It is therefore believed that any clinical or pathologic diagnosis of breast hyperplasia does not necessarily represent a pathology, and that a significant proportion or even the vast majority of these may be physiologic. Therefore, breast hyperplasia itself does not increase the risk of breast cancer.