Mammary gland hyperplasia is the most common breast disease in women, mainly related to women’s endocrine dysfunction, which can be manifested as breast swelling and pain, tingling, etc. Imaging examination can confirm the diagnosis, and some of the patients can be cured by themselves without treatment. 1. Etiology: It is mainly caused by the proliferation of breast glands stimulated by the increase of estrogen level in women, in addition, the patient’s dietary inattention and irregular life and work can also lead to breast hyperplasia. 2. Clinical manifestations: patients usually have no symptoms, but some of them may have breast swelling and tingling associated with menstruation, which may also be accompanied by nipple discharge. 3. Examination: Patients with breast hyperplasia should go to the hospital for ultrasound and other imaging examinations, especially for patients around 40 years old, as breast hyperplasia may also be accompanied by breast cancer, and the cancer may be hidden in the hyperplasia. The cancer may be hidden in the enlarged breast, which can be detected by ultrasound and other imaging tests to avoid missing the diagnosis. 4. Treatment: After diagnosis, patients should adjust their diet and daily routine in time, and some patients with hyperplasia can recover on their own. If other serious symptoms or other accompanying diseases are found during the examination, the physician will treat the patient according to the specific situation. For patients with breast hyperplasia, they should immediately go to a regular hospital, so as not to miss the diagnosis, misdiagnosis and delay the condition. At the same time, patients also need to maintain a positive and optimistic mindset.