Mammary gland hyperplasia is more prevalent, especially in patients around the age of 40. Many patients have cyclical pain in the breast, generally with both breasts appearing at the same time. Most patients are caused by hormone level disorders, for example, estrogen levels will rise significantly before the onset of menstruation, and after the end of menstruation estrogen levels will fall, leading to breast hyperplasia and incompetence, which will lead to cyclical pain in the breast and other phenomena, and the incidence is generally higher in patients around 40 years old The incidence is generally higher in patients around the age of 40. Many people may have small nodules in their breasts, especially during ultrasound examinations, which can reveal disorders in the internal structure of the breasts, and it is recommended to come to the hospital for examination and treatment.