Most modern women pay attention to the beauty of their breasts and try to make them plump and attractive. Indeed, the proud breast is a symbol of female sex appeal and beauty. However, women’s breasts are a “disaster-prone place” and there are many kinds of breast diseases that can seriously affect their physical and mental health and even endanger their lives. Especially breast cancer is one of the most common malignant tumors in women. Although China is a low incidence region for breast cancer, the incidence rate is increasing year by year, and in recent years, it has leaped to the first or second place of female malignant tumors in some large cities in China, and the age of incidence is becoming younger. At the same time, breast cancer is a curable cancer, and its prognosis is greatly related to the early and late stage of the disease when treated. Breast cancer screening (or screening) is a population-based cancer prevention measure for asymptomatic people. Breast cancer screening is an effective, easy and economical way to screen asymptomatic women for early detection, early diagnosis and early treatment of breast cancer. The ultimate goal is to reduce the mortality rate of breast cancer in the population. There are two types of screening: opportunistic screening and group screening. Opportunistic screening is an individual woman’s initiative or voluntary visit to a medical institution that provides breast screening; group screening is an organized community or unit entity that provides breast screening for women of appropriate age. Opportunistic screening is generally recommended to start at the age of 40 years old, but for those who are at high risk of breast cancer (those with a clear genetic predisposition to breast cancer, those with previous moderate to severe atypical hyperplasia or lobular carcinoma in situ, and those with lymphoma who have previously undergone chest radiotherapy), the screening age can be advanced to 20 years old. In contrast, the recommended age for group screening is 50 to 69 years of age. Age 20 to 39 years, if not a high-risk group generally do not perform breast screening. If you are 40-49 years old, you are suitable for opportunistic screening, you can have a mammogram once a year, the radiation dose of routine mammograms is low and does not endanger women’s health, and it can be combined with clinical checkups, and in case of dense breast, it can be combined with ultrasound. Breast can be combined with ultrasound. 70 years of age or older, suitable for opportunistic screening, with mammography every 2 years in combination with clinical examination, or with ultrasound in case of dense breasts. Breast self-examination: alone as a measure of breast cancer screening is not effective, and it is difficult for women to self-identify the nature of breast tumor, which cannot improve the early diagnosis rate of breast cancer and reduce the mortality rate. To raise women’s awareness of cancer prevention, it is recommended that women with high-risk factors ask medical professionals for advice on how to perform breast self-examination once a month, and premenopausal women should be advised to choose 7-10 days after their menstrual period for breast self-examination. However, if the following breast cancer red flags are present: nipple discharge; sudden nipple depression; pain, itching or scaly patches around the nipple; change in size and shape of the breast; indentation and wrinkling of the breast skin or “orange peel” changes; frequent pain in a specific area that does not change with the menstrual cycle; redness, swelling or The area with a burning, pins-and-needles sensation that does not recede. It is important to consult an experienced health care provider or a regional breast center.