We all seem to be familiar with the term “breast hyperplasia”, but how many of us know what “breast hyperplasia” is? Clinicians diagnose “severe breast hyperplasia” by touching the breasts, patients are often told “you have breast hyperplasia” after ultrasound, and “breast hyperplasia” is often written prominently in the report column of mammogram. “I have asked many “patients” who think they have been suffering from breast enlargement for years, what is breast enlargement? The answers are varied: “I don’t know”, “it’s a lump”, “breast pain”, etc. Not only the patients, but also many non-breast specialists. Not only the patients, but also many non-breast specialists are unable to explain what “breast enlargement” is. “What is breast enlargement? What happens if you have breast enlargement? Breast enlargement is a non-inflammatory, non-tumor-like, benign change in the structure of the breast, and it covers a wide range of conditions, not just one or the other. Symptoms of breast hyperplasia may include breast cysts, breast pain, nipple discharge and other manifestations, but it is not as simple as “equal to” “breast cysts” or “breast pain” and so on. In the past, it was often said that “the smell of cancer”, nowadays many women have reached the point that “the smell of hyperplasia is also colorful”. In fact, it is not necessary. The term “breast enlargement” itself is a term of pathology. It is the name of a pathologic diagnosis made by observing cell changes under a microscope. Therefore, a doctor’s hand to touch the breast to say “breast hyperplasia”, ultrasound doctors look at the image to diagnose “severe breast hyperplasia”, radiologists take a film to conclude that “breast hyperplasia” are not scientific. “It is not scientific. There are many other names for breast enlargement: cystic hyperplasia, fibrocystic breast disease, sclerosing adenopathy, etc. The World Health Organization (WHO) recommends the term “breast enlargement”. The World Health Organization recommends the name “benign breast dysplasia”, which may be easier for patients to understand and less likely to cause unnecessary panic. It is recommended that ultrasound and molybdenum target reports should not blindly diagnose breast hyperplasia, but should promote the use of breast imaging classification diagnostic system (Class 1 no lesions, Class 2 benign lesions, Class 3 possibly benign lesions, Class 4 possibly malignant lesions, Class 5 consistent with malignant lesions). Therefore, it is not necessary to be alarmed when you hear that you have “breast hyperplasia”, but only the conclusion of “breast hyperplasia” after surgical biopsy is reliable. And only with “atypical hyperplasia” the risk of breast cancer will increase (1.5-5 times), such patients need to adhere to at least once a year to the regular hospital mammography department to do a breast examination.