1.Screening recommendations for women in general Mammography can reduce breast cancer mortality in women over 40 years old, which has been recognized by most scholars at home and abroad. In contrast, Chinese women have a higher proportion of adipose glands in their breasts, especially younger women have more dense glands, and X-ray is less effective in examining dense glands. women in the general population without risk factors for breast cancer breast screening is recommended for women aged 20-39 years, no breast screening is recommended; for women aged 40-49 years, annual X-ray; for women aged 50-69 years, every one to two years; for women aged 70 years and above, every two years. The above mammograms are recommended to be combined with clinical examination and ultrasound for dense breasts. 3. Screening for high-risk group refers to women with obvious genetic predisposition to breast cancer, such as those with one or more breast cancer patients in their immediate family; those with previous ductal and lobular moderate to severe atypical hyperplasia and lobular carcinoma in situ Women with prior cardiac radiation therapy. For breast cancer screening in high-risk groups, it is recommended to advance to 25-40 years old and to screen once a year by the same means as above, including clinical examination by a doctor, ultrasound, mammogram and, if necessary, new imaging means such as MRI. 4. Women’s breast self-examination needs to emphasize the correct time period and the correct technique, i.e., on the 7th-14th day of each menstrual cycle, with four fingers straightened and slightly strained Check each area of the breast in a circle, and if a definite lump is found, go to the hospital. Be careful to learn the doctor’s examination technique. The wrong technique is to grasp and pinch the breast with five fingers, when it is easy to treat a normal breast gland as a lump.