Mammary gland hyperplasia includes both physiological hyperplastic processes and pathological hyperplastic changes. The physiological changes are predominant in young women and strictly speaking most young women with breast pain are not suffering from true disease. Pathological hyperplasia, also called chronic cystic hyperplasia of the breast, usually occurs in young and middle-aged women. Some people need to be treated with medication because the pain is more severe. But it is difficult to cure completely. Diseases of the breast are nothing to worry about as long as they are not malignant. It is precisely because of the fear of developing malignant tumors of the breast that many women often worry. Breast enlargement is a relatively long and slowly progressing process that will basically stop after menopause. However, if a lump grows in the breast after menopause, malignant tumors are more likely. The transitional stage from normal breast tissue to malignant tumor is called atypical hyperplasia. If there are nodules in the breast that gradually grow to a tumor-like shape, some of them are atypical hyperplasia. Atypical hyperplasia generally requires a pathologist’s diagnosis to be accurate and is classified as mild, moderate or severe. Mild atypical hyperplasia does not necessitate treatment. If a nodule in the breast is suspected to be a severe atypical hyperplasia, removal is usually recommended.