Many women think that if their breasts don’t hurt or itch, they don’t need regular checkups. Or if it is only swelling and pain before menstruation, it is breast enlargement, and there is no need for regular checkups. In fact, the air and water pollution, unsafe diet and other factors have increased the chances of tumor. Here is the necessity of regular checkups. The significance of breast screening Breast cancer is a common malignant tumor that endangers women’s physical and mental health. Globally, 1.2 million women suffer from breast cancer and 500,000 women die from breast cancer every year, and its incidence is still increasing, which has posed an increasing threat to women’s life and quality of life. Breast cancer is in fact a malignant tumor that develops relatively slowly, and it is generally believed that its multiplication time is ≥2.5 years; from the formation of a single cell to the development of a clinically palpable 0.1 cm size lump, it takes 30 divisions to multiply, and it takes 5-8 years to grow to a 1 cm size lump in diameter. Therefore, there is enough time and space for early detection of breast cancer. Since the 1970s, a large number of randomized controlled studies have increasingly demonstrated that breast cancer is another malignancy after cervical cancer that can reduce mortality through screening, and that such tumors often have a long clinical stage, early treatment can change the prognosis, and their screening methods are simple, reliable, sensitive, safe, and more economical. Through the practice of breast cancer screening in countries with a high prevalence of breast cancer, most studies at the end of the 20th century concluded that in areas with a high prevalence of breast cancer, screening can reduce the mortality rate of breast cancer patients, but not the incidence of breast cancer. The possible benefits of screening are improved prognosis for patients with detected tumors and increased rates of breast-conserving treatment. Many people mistakenly believe that screening should focus on high-risk groups, but in fact, only about 30% of breast cancer patients have clear risk factors, so although high-risk groups are the focus of breast cancer screening and may become the target of preventive intervention, the current screening and education work should target all women. Screening methods and steps 1.Specialist examination: Due to their practical experience, specialists generally have a higher accuracy rate, some of them can reach 70-80%. 2.Auxiliary examination: There are many examination techniques used for breast disease screening, but the only valuable and feasible techniques are mammography and ultrasonography. Ultrasonography is economical, easy, painless, without radioactive damage, and can be used repeatedly in a short period of time. It is more suitable for young women, especially pregnant and lactating women, but it is not as sensitive as mammography in detecting microcalcifications, and can be used as an adjunct to x-ray to detect dense breast; it is accurate in positioning and shows clear levels of breast; it can detect axillary and supraclavicular lymph nodes. The 2003 American Cancer Society (ACS) guidelines for breast cancer screening recommend that women begin breast screening at age 40; the benefits and risks of breast screening should be determined based on the health status and life expectancy of older women to determine whether to continue screening. Continuation of screening should be determined based on the health status and life expectancy of older women. If a woman has a history of breast cancer or a family history of breast cancer, the age of screening should be advanced. Later, the interval between films will be decided based on physical examination, x-ray, and the patient’s risk factors. The interval between 2 shots should not be too close unless clinically necessary for diagnosis. 3.Qualitative diagnostic examination: In the census, puncture cytology or histological examination is needed for the suspicious subjects found to make the final qualitative diagnosis.