The following factors are risk factors that have been confirmed by epidemiological studies to increase the risk of breast cancer, and women of childbearing age can check how many of them they have according to their own situation 1. High incidence age, 35-65 years old; 2. Family history of breast cancer (breast cancer in the immediate family); 3. Breast enlargement that does not heal for years (more than three years); 4. Repeated abortions (more than three times); 5. Breast fibroadenoma and uterine fibroids; 6. Celibacy or conceiving the first child after 35 years old; 7. First menstruation <13 years old; 9. Menopause >55 years old; 10. The following adverse life events within the last 5 years; 11. No regular physical activity (more than once a week is considered regular); 12. Obesity; 13. Preference for meat; 14. Repeated long-term exposure to various types of radiation (e.g., multiple body X-rays within a year); 15. Common use of hormone-based drugs or hormone-containing cosmetics. Second, among the above risk factors, 1-9 are called unchangeable factors, meaning that they cannot be changed through behavior, 9-15 are called changeable risk factors, meaning that the occurrence and magnitude of these factors can be changed through conscious means. These risk factors only mean an increased risk of breast cancer, but not a certainty of breast cancer, so women with these factors do not have to carry the burden. If you have any of the above risk factors, especially if you have three or more of them, it is better to consult a specialist and take active measures to reduce and eliminate the effects of risk factors.