Since ancient times, China has had the saying that “upper medicine treats the untreated”, emphasizing the elimination of diseases at the budding stage. Modern medicine also emphasizes prevention, such as diabetes, which can be divided into three stages: primary prevention is pre-onset prevention, which means improving lifestyle and losing weight to reduce the incidence of diabetes; secondary prevention is to emphasize blood sugar screening in high-risk groups so that diabetes can be detected early; and tertiary prevention is to carry out standardized treatment in patients who have been diagnosed with diabetes to avoid complications or even death from diabetes. Tertiary prevention is to provide standardized treatment for patients with diagnosed diabetes to avoid complications and even death. A similar tertiary prevention strategy can be adopted for breast cancer. 1. How to really prevent the occurrence of breast cancer? We know that the incidence of breast cancer in China is now on the rise in China, especially in major cities such as Beijing and Shanghai, and the incidence is getting closer to that of Western countries. This is probably related to both the westernization of our lifestyle and environmental deterioration. Based on the data obtained from epidemiological surveys, we have compiled some risk factors associated with the development of breast cancer, some of which, such as gender and age, are beyond our ability to change, while for those risk factors that can be adjusted, we can make targeted adjustments to achieve true prevention. 2. I have many risk factors, how should I detect them early? Early detection of breast cancer focuses on raising awareness of prevention and regular breast self-examination. Women of age should go to the hospital for screening and receive ultrasound or mammogram. If abnormalities such as lumps or fluid overflow have been detected, they should be examined as soon as possible. 3.How to perform breast self-examination? The significance of breast self-examination is to improve our familiarity and attention to our breasts. It is required to be carried out on a relatively regular day of each menstrual cycle, avoiding the days before and after menstruation as much as possible. The focus is on comparison with the past, and new problems that arise usually require a hospital visit. The specific method is as follows: Step 1: Stand upright in front of a mirror, cross your arms and observe the symmetry of your breasts for any abnormalities. Step 2: Raise your hands and observe. Step 3: Touch the breasts carefully, in order to avoid missing them. When touching, you should put all four fingers together and pinch to easily find “false” lumps. Step 4: Lie down and touch. Finally, don’t forget to squeeze the nipple to see if there is any overflow.