Breast cancer is one of the most prevalent cancers in the world, ranking second only to lung cancer. We must pay attention to the prevention of breast cancer, especially when Chen Xiaoxu and Yao Beina died because of breast cancer, this disease seems to appear more and more around us and endanger our health. Regarding the prevention of breast cancer, there are mainly the following points: 1. Actively treat benign diseases of breast: such as mastopathy, intraductal papilloma, breast fibroadenoma, benign diseases have the risk of malignant change with the prolongation of time. 2, reasonable diet: often eat vegetables and fruits, grains and cereals and other foods rich in fiber, or low fat, or low animal protein; strengthen physical exercise to reduce the occurrence of obesity. Eat less or do not eat plant and animal foods containing high estrogen, such as hashish, vitamin E, soy isoflavones and other health products, and eat less sweets. 3, do not often do abortion: childbirth is a natural physiological process, while abortion is a forced termination of pregnancy, which can easily cause breast pain, or induce diseases such as lobular hyperplasia of the breast, causing lumps and greatly increasing the chance of breast cancer. 4.Take appropriate marriage and childbirth: don’t be celibate, get married when you should get married, give birth when you should give birth, preferably not at an advanced age, breastfeed and breastfeed your baby as much as possible. 5.Do not smoke, drink alcohol or coffee: alcohol can stimulate the secretion of prolactin in the anterior pituitary gland, which is related to the occurrence of breast cancer. Therefore, women, especially those before and after menopause, should abstain from alcohol and drink less alcohol. Coffee, cocoa and chocolate contain a large amount of xanthine, which can promote breast hyperplasia, and benign breast hyperplasia is related to the occurrence of breast cancer. If women, especially premenopausal women, consume too much of these foods, the risk of breast cancer will increase greatly with the large intake of xanthine. 6.Regulate mood, be optimistic and avoid excessive stress: excessive stress will lead to endocrine dysfunction, which will easily cause breast enlargement and other diseases, and the risk of breast cancer will increase. 7. Increase physical activity and avoid obesity: High-fat diet is a stimulant for breast cancer. Long-term intake of fat can make the body produce a lot of estrogen-like and prostaglandin-like substances, which can stimulate the growth of cancer in excess. Proper exercise can improve the body’s immunity and avoid obesity. Therefore, controlling fat intake, reducing obesity, improving body immune mechanism and disease resistance can effectively prevent and reduce the occurrence of breast cancer. 8. Be careful with hormonal drugs: Misuse or abuse of hormonal drugs can lead to endocrine disorder and increase the possibility of breast cancer. 9.Do not take health products containing more estrogen often: such as propolis, royal jelly, pollen, etc. Try to use less cosmetics containing hormones, also to reduce the intake of hormones. 10.Loosen the ties to your breasts: women who wear bras for more than 12 hours a day are 21 times more likely to develop breast cancer than those who wear bras for a short period of time, and it is recommended to wear bras for no more than 8 hours a day. 11. Eat foods that can prevent breast cancer often: vegetables include tomato, carrot, cauliflower, pumpkin, garlic, spring onion, asparagus, cucumber, loofah, radish, etc. Fruits include grapes, kiwi, lemons, strawberries, mandarin oranges, figs, etc., which not only contain multivitamins, but also contain substances that fight against cancer and prevent the synthesis of carcinogenic substances nitrosamines. Fish include yellowtail, snapper, loach, scallop, octopus, squid, sea cucumber, oyster as well as kelp and sea artemia because they are rich in trace elements and have the effect of protecting the breast and inhibiting cancer growth. Edible mushrooms such as silver fungus, black fungus, shiitake mushroom, monkey head mushroom and poria are natural bio-response regulators, which can enhance the immune system and strengthen the body’s resistance and have a strong cancer prevention effect. Others are milk and its products, which are good for breast health and can supplement calcium, as well as wheat (flour), corn, soybeans and some miscellaneous grains are good for health. Barley contains high amounts of soluble and insoluble fiber. Soluble fiber helps the body metabolize fat, cholesterol and carbohydrates, and lowers cholesterol. Insoluble fiber helps with digestive health and prevents cancer. Nuts are food kernels and fruit species, containing a large number of antioxidants, which can play a role in the anti-cancer effect. 12.Keep your bowels open and ensure that you have a bowel movement once a day. 13.Go to regular hospital mammography clinic for breast examination regularly: Generally, women with breast enlargement disease and family history of breast cancer should be examined every three months to six months, and normal people should be examined once a year. First, let the specialist do a palpation examination, and if there is any problem, breast ultrasound or x-ray mammogram can be done. The doctor will decide which examination to choose according to the patient’s specific situation. Generally women over the age of 40 should have an x-ray mammogram once a year.