With the improvement of living standards and technological advancement, the detection rate of breast cancer worldwide is increasing year by year and is trending younger. Like other malignancies, the causative factors of breast cancer are complex, but certain high-risk factors do exist. If appropriate interventions are made to these factors, it may help to reduce the incidence of breast cancer. So, what are the prevention of breast cancer? Although the pathogenesis of breast cancer is not completely clear yet, it is possible to reduce the risk of breast cancer by making corresponding changes in lifestyle for the identified high-risk factors. The occurrence and development of cancer are closely related to the mental and psychological factors, especially breast cancer. Therefore, women should learn to self-regulate and manage their emotions well, and deal with emotional disputes and crises in their lives sensibly. Only when the spirit is comfortable, it is conducive to psychological balance and physiological balance, so as to build up a defense line to stop cancer. Another reason why exercise can reduce the chance of breast cancer is that it can reduce body weight. For girls entering the puberty period, while meeting the nutrients needed for growth and development, it is necessary to control the intake of high-fat and high-sugar foods to avoid excess calories and obesity; during pregnancy and delivery and after menopause, it is more important to prevent obesity to reduce the risk of disease. 3. Try not to drink alcohol and live a reasonable and healthy lifestyle Drinking alcohol is a potential risk for breast cancer. You should establish a scientific lifestyle, regular living hours, combine work and rest, and ensure sleep; have a balanced diet, eat less animal fat, fried and smoked food and sweets, quit smoking and drinking, and eat more green vegetables, fruits and vegetables; consistently participate in sports and exercise; the age of marriage should not exceed 28 years old, the age of childbirth should not exceed 30 years old, and lifelong sterility is not encouraged; do a good job in contraception and prevent multiple abortions; and advocate breastfeeding after childbirth. Breastfeeding after childbirth. 4. Regular check-ups to keep away from breast cancer Breast cancer has a better prognosis if detected early. Therefore, young and middle-aged women should insist on regular checkups for early detection and early treatment. Checkups should start from the age of 30. For the general population aged 30-49, 1 check-up every 1-2 years; for women aged 50 or above, 1 check-up every year. For high-risk groups, once a year after age 30. Self-examination of the breast can also be performed under the guidance of a physician.