The World Health Organization states:With preventive measures, deaths can be reduced by half. The fundamental purpose of medicine is not to cure the sick nor to treat the patient, but to promote health and make everyone healthy. As the ancients say, “The doctor treats the sick before they get sick, and the sage does not treat the sick before they get sick”. So, how to prevent the occurrence of breast disease: 1, avoid staying up late: maintain a good lifestyle, follow the laws of nature, to ensure adequate sleep. 2, adjust the mentality, release stress, maintain a balanced mind, do self emotional “good housekeeping”: forgive others, do not hold grudges against people; happy to know the fate, do not just force yourself; laugh, be grateful and cherish all that you have. 3.Healthy diet, weight control: reduce the intake of animal food, eat more whole grains, brown rice, vegetables, soy products; reduce alcohol consumption, do not smoke; maintain a normal weight. 4. Exercise regularly and get more sunshine: Stop saying to yourself: no time to exercise. A recent study published in the Journal of the National Cancer Society reported that exercise can reduce the incidence of breast cancer by 60% in women before and after menopause. A Norwegian research institute surveyed 25,624 women and found that those who exercised at least four hours a week had a 37 percent lower chance of developing breast cancer. 5. Wearing bras and underwear with breast health functions. Cotton is appropriate, and it is not advisable to wear tight underwear for a long time, to often “loosen” the body. 6, harmonious family life: to create a harmonious family life, while you should choose the right form of contraception, adhere to a good and reliable contraception. Some statistics show that breast diseases induced by abortion accounted for about 40%, while the abuse of contraceptive pills women are also more likely to occur some breast diseases. 7, caution, prohibit the use of high hormone-containing food, health products, cosmetics, etc. 8, adhere to breast health care and maintenance, breast health “three one”: once a year breast professional examination, once a month breast self-examination, once a day breast care maintenance. Once you find a breast swelling and pain, lumps to go to the hospital in a timely manner.