Since early stage breast cancer, especially in situ cancer, is completely curable, but early stage breast cancer often has no symptoms, the significance of breast screening becomes particularly prominent. The purpose of screening is to detect malignant tumors early, treat them early and reduce mortality. Although the goal of screening and the significance of screening are clear, the percentage of domestic participants in screening is still very low. Today, when the incidence of breast cancer is gradually increasing, we hope that our fellow women can raise their health awareness, correctly understand the importance of screening and make a little health investment for themselves. From the age of 20, women should have a monthly breast self-examination and a breast physical examination by a doctor every 3 years; women over 35 should have a basic mammogram as a control material to judge their condition later; women over 40 should have an ultrasound examination once or twice a year and a mammogram every year; those over 60 should have a mammogram every 1 to 2 years. These screening recommendations only apply to women without signs and symptoms of breast cancer, while those with abnormal breast signs should undergo the necessary tests immediately to rule out breast cancer. Commonly used means of breast cancer screening include breast self-examination, physician physical examination, ultrasound, mammography, ductoscopy, magnetic resonance imaging (MRI) scan, and tissue biopsy. The following three methods are recommended to stop breast cancer from sneaking up on you: 1. Ask a specialist for clinical examination of breast lumps and nipple discharge to assess whether you are at high risk of breast cancer. 2. Appropriate auxiliary examination. Ultrasound can be chosen as the main means of routine examination and review. For small nodules detected by ultrasound, MRI can be performed, which is characterized by comprehensive investigation and high sensitivity and specificity; for nipple overflow and blood spill, ductography or ductoscopy can be performed to clarify the diagnosis. All the above examinations have important clinical value for breast cancer diagnosis.