Mammary gland hyperplasia is one of the common and frequent diseases in women, mostly seen in women aged 25 to 45 years old, and about 5% of patients will turn into breast cancer. Since a small percentage of patients with breast hyperplasia may develop into breast cancer, some scholars believe that breast hyperplasia may be a “precancerous lesion” of breast cancer. If the amount of hormones secreted by the ovaries in a woman’s body is not quite normal, she will easily develop this problem. The endocrine disorder is also manifested by excessive or low menstrual volume and inaccurate menstrual periods. Another important factor is mental factor. The mental pressure of modern people is very high, so some women are prone to endocrine disorders, plant nerve disorders, poor sleep and irritability caused by mental factors, all of which will have a negative impact on the breast. Also, now that people have a better diet, there are more people with high blood pressure and diabetes, which also tend to make women have endocrine disorders, estrogen, progesterone levels and glandular structure are disrupted to some extent. Second, the high-risk groups of breast enlargement 1, 13 years old or before the first menstruation or to 50 years old has not stopped menstruation. 2. Those who are not breastfeeding, have not given birth, are over 35 years old and have had their first pregnancy or are unmarried. 3.Multiple abortions. 4, long-term high-fat and low-fiber diet, frequent alcoholics. 5.People with long-term mental depression or those who have suffered from severe mental stimulation. Can mammary gland hyperplasia become cancerous? Whether there is a direct relationship between mammary gland hyperplasia and breast cancer is still uncertain. Some data show that there is a correlation between the two diseases. The risk of breast cancer in women with mastocytosis is 2 to 4 times higher than that in women in general, and the results of long-term follow-up show that the incidence of breast cancer accounts for about 5% of all mastocytosis patients. We suggest that the best way to detect breast cancer early is to combine good breast self-examination habits with regular medical checkups. In general, women aged 20 to 40 should have a mammogram every two years and women over 40 should have a mammogram every year. Clinical manifestations of breast enlargement 1. Premenstrual swelling and pain in the breast. 2, “lumps” can be found in the breast. 3.Overflowing nipples. 4.Menstrual disorders. 5.Emotional changes.