In recent years, the incidence of breast cancer in China has topped the list of female malignant tumors, which makes us pay more and more attention to it. How should we deal with it? The key lies in early detection, and early detection in turn lies in early examination. In fact, even a healthy woman needs to have a mammogram! So how much do you know about the methods of breast examination? 1, breast self-examination: Often patients are consulted because they feel a lump in the breast, daily should not miss a trace. Self-examination can generally be done when waking up, sleeping, changing clothes, bathing, recommended once a month, pre-menopausal women are recommended 7-10 days after the onset of menstruation. The following are the steps of the four-step breast self-examination: 2. Clinical breast examination: Although there is no evidence that this method can improve the early diagnosis rate of breast cancer and reduce the mortality rate, the initial grasp of breast disease by a breast clinical examination by an experienced breast specialist is likely to help make up for the omission of mammography screening. Mammography (mammography): Mammography has the most advantages in detecting microcalcifications, which in turn can detect asymptomatic or untouchable tumors, and has been recognized by most scholars at home and abroad for its role in reducing breast cancer mortality in women over 40 years old. However, mammography has poor penetration of young dense breast tissue, and Asian women tend to have dense breasts. In addition to the radioactivity of mammography, mammography is generally not recommended for women under 40 years of age who do not have clear risk factors for breast cancer or whose clinical examination does not reveal any abnormalities. Breast ultrasound: Compared with European and American women, the proportion of premenopausal breast cancer patients in China is higher, and the breast is relatively denser. In this regard, breast ultrasound has a great advantage over mammography, plus it is non-radioactive and can identify cystic lumps and understand whether the lymph nodes in the axilla and supraclavicular area have metastases. However, it cannot be ignored that ultrasound is difficult to distinguish many tiny calcified foci, which needs to be complemented by mammography. 4.Magnetic resonance imaging (MRI) of breast: MRI of breast has high sensitivity to invasive breast cancer and helps to detect some clinical and mammographic occult breast cancer, but it requires high equipment requirements, is expensive, requires intravenous enhancement agent, and contraindications including pacemaker and aortic coarctation should also be considered. Conclusion: The treatment of breast cancer is becoming mature and breast cancer prevention is a top priority. Therefore, breast examination is essential!