1, screening: pay attention to the screening and self-examination of breast diseases. You should routinely go to a breast specialist at least 1-2 times a year for breast health checkup. It is often possible to detect breast cancer at an early stage, so that it can be treated in time and eliminate the psychology of luck and fear. 2. Emotional conditioning: maintain a good state of mind and a positive and optimistic attitude towards life. Psychological factors play a very important role in the occurrence, development and prognosis of breast disease. Bad mood is a predisposing factor for breast disease. Reduce work stress. 3, exercise: moderate amount of exercise such as walking, jogging, etc. Improve ovarian function and regulate endocrine. 4, age-appropriate marriage and childbirth, less abortion: marry and give birth before the age of 29. Full breastfeeding after childbirth (six months to a year). Do a good job of contraception, try not to take or take less contraceptive pills, and do less abortions. 5.Actively treat benign breast diseases: Pre-cancerous lesions such as fibrocystic hyperplasia of the breast, poor local structure of the breast and atypical hyperplasia of the breast should be actively treated. The purpose of treatment is to improve the structure of breast tissue and prevent the occurrence of breast cancer. 6. Develop good living habits: stay away from ionizing radiation, avoid applying large amount of estrogen, adjust dietary structure, maintain body weight and eliminate obesity.