Breast enlargement can be categorized into physiological and pathological. Physiologic breast enlargement is quite simply a simple enlargement of the breast. During puberty and maturity, estrogen acts as the driving force for breast development, while progesterone is the umbrella for the breast. With the expression of estrogen and progesterone in the menstrual cycle, the mammary glands also show cyclic changes, usually hyperplasia before menstruation, and I will have breast swelling and even pain. There is no need to be nervous at this time, and it will be relieved after menstruation. The focus of this article is the pathologic breast hyperplasia, here first comfort the patient, there is no need to panic. Breast hyperplasia is the most common and highly prevalent disease in developing women, and is also known as lobular hyperplasia, mammary dysplasia, fibrocystic disease, chronic cystic mastitis and so on. Next, let’s recognize what is pathological breast hyperplasia. 1, the causes of breast hyperplasia In a nutshell, it is closely related to the imbalance of the ratio of estrogen and progesterone in a woman’s body. Psychological factors and poor living and dietary habits also affect the level of estrogen and progesterone. The reason is not complicated. The above mentioned role of estrogen and progesterone, when the ratio of estrogen and progesterone is imbalanced, the estrogen level is at a high level for a long time, which constantly stimulates breast hyperplasia, causing disorders in the breast tissue, fibrosis of mammary glands and breast pain. 2, the clinical manifestations of breast hyperplasia are mainly breast swelling and pain and breast lumps. Breast swelling and pain can involve one side or both sides, and in serious cases, it can affect daily life. Clinical manifestations are often cyclic breast swelling and pain, which is more powerful before menstruation and relieved or disappeared after the end of the cycle. Breast lumps are found in the upper and outer quadrant of the breasts, which may be single or double, or more or less. It is often in the form of a lump, medium texture, good activity, border is not obvious, often with tenderness, and the size of the lump has the characteristic of changing with the menstrual cycle. Other manifestations of breast hyperplasia such as: nipple discharge, menstrual disorders, mood changes. 3, breast hyperplasia, what to do? In the face of the problems brought about by breast enlargement, many patients are worried, more afraid of long lumps is not good, how do I need to deal with? Do you need to take medicine? In fact, 95% of breast hyperplasia is simple hyperplasia and will not become cancerous. Pathological breast hyperplasia is not equivalent to precancerous lesions, and not all precancerous lesions will develop into breast cancer. Therefore, there is no need to be overly nervous, and there is usually no need to take medication routinely. Some suggestions for the causes of breast hyperplasia: (1) Mental state: during the day, the mood should be kept cheerful and the spirit should not be suppressed, which is the key. (2) healthy diet: change diet, to eat less fried, spicy and other stimulating foods, eat more vegetables and fruits, eat more coarse grains, less smoking, drinking. (3) life tips: usually should wear comfortable underwear, never too tight underwear. Live a regular life and keep a harmonious sex life. Don’t breastfeed for less than one year after delivery. (4) Breast examination: It is appropriate to conduct breast self-examination one week after the end of menstruation. As for the lumps of breast hyperplasia, it is recommended to receive breast specialist examination once a year, mammography, ultrasound and so on. Conclusion: breast enlargement is not terrible, and breast cancer is not necessarily linked, there is no need to be overly nervous, sleepless nights, to “laugh” – breast enlargement!