Lobular hyperplasia can be detected by ultrasound, appearing as heterogeneous hypoechoic areas on the ultrasound, and if cysts form, they appear as anechoic areas. The exact cause of lobular hyperplasia in the mammary glands is not very clear. It is currently believed to be related to elevated levels of estrogen caused by endocrine disorders, external environmental factors, work and living conditions, interpersonal relationships, and various other stressors that affect the psychological aspects, all of which can change the body’s internal environment. This in turn affects the function of the endocrine system, causing abnormal secretion of one or several hormones, ultimately disrupting the balance of hormone levels in the body, leading to increased estrogen, and causing mammary tissue hyperplasia.