There is no operation, and it is important to consider whether estrogen is contained in the medication after operation. At present, the medical community has recognized that the cause of mammary gland hyperplasia is endocrine disorder. The decrease of lutein secretion and the relative increase of estrogen are important reasons for breast hyperplasia. Other factors include: abortion, infertility or childbirth over 30 years old, not breastfeeding, long-term use of health products containing hormones, wearing tight bras, etc. These are harmful to breast health.