Who is prone to get breast cancer? 1. Women with “breast enlargement” or “benign lesion” after repeated surgical biopsies. 2.Women who are unmarried or have no children after marriage, or those who start to have children at the age of 35 or above, or those who do not breastfeed after giving birth. 3, early menarche, or late menopause, menstruation period greater than 35-40 years. 4.Women who often use estrogen-containing supplements. 5, obese 6, women with long-term mental depression 7, women with long-term exposure to radioactive sources. 8.Women who drink alcohol or smoke for a long time. 9.Women with family history of breast cancer. What are the risk factors for the development of breast cancer? The exact cause of breast cancer is not yet fully understood, but the following risk factors are clear: 1. Gender factor: The risk of breast cancer in women is about 100 times higher than that in men, mainly due to the influence of estrogen. 2. Age factor: The high incidence of breast cancer in China is between 35-55 years old. 3. Menstrual factors: early menarche, before the age of 12, or menstruation for more than 35 years. 4. Reproductive factors: being unmarried, not having children or having a first birth older than 35 years old are all risk factors for breast cancer. Breastfeeding factor: Epidemiological survey found that breastfeeding rate is lower in areas with high incidence of breast cancer than in areas with low incidence, and the duration of breastfeeding is also shorter, indicating that breastfeeding is related to the occurrence of breast cancer. Sex hormone factors: endogenous estrogen refers to the estrogen secreted by patients themselves, epidemiological survey found that postmenopausal women with breast cancer have 15%-20% higher estrogen level than healthy women; exogenous estrogen includes birth control pills containing estrogen, women who have been using them for a long time, and women who use hormone replacement therapy during menopause to reduce uncomfortable symptoms have a higher risk of breast cancer. 7. Dietary factors: High fat can stimulate increased secretion of estrogen, which stimulates the breast and increases the risk of breast cancer. In addition, excessive alcohol consumption can also induce breast cancer. Pre-cancerous lesions of breast: Some of the precancerous lesions of breast cancer will develop into cancer after follow-up. Pre-cancerous lesions of breast cancer include: ductal epithelial atypical hyperplasia, lobular atypical hyperplasia and multiple intraductal papillomas. 9.Ionizing radiation: The longer the exposure to radiation or the younger the age of exposure, the higher the risk of breast cancer development. 10.Family factors: Genetics believes that the same type of cancer that occurs in multiple members of a family is called familial cancer. Women who have a history of breast cancer in their immediate family (mother and sisters) have a risk of breast cancer several times higher than the normal population, and the risk is related to the age of breast cancer incidence and unilateral or bilateral of the family members. Breast cancer associated with heredity accounts for approximately 10% of cases.