1. Glandular ultrasound: When a lump is felt during breast self-examination or physical examination, the first choice of ancillary examination is breast ultrasound. The advantage of breast ultrasound is to distinguish the difference between cystic and solid lesions. Its diagnostic accuracy for breast cysts can be as high as 95%; ultrasound can analyze the morphology and nature of lesions comprehensively through multi-angle and all-round scanning, such as transverse or longitudinal section and radial section or non-radial section, and the examination is more thorough; besides the general “black and white ultrasound”, “color ultrasound In addition to the general “black and white ultrasound”, the application of “color ultrasound” is also becoming more and more widespread, which can determine whether there is irregular blood flow in the lesion through color Doppler blood flow signal analysis, thus helping to distinguish benign and malignant lesions. Eastern women have smaller breast glandular tissues than Western women and are generally denser. Ultrasound is more sensitive than X-ray in detecting breast lumps, and ultrasound is safe and harmless, so it is especially suitable for routine breast examination of women with dense breasts or during pregnancy. 2, mammography: mammography, known as mammography, also known as molybdenum and palladium examination, is currently the first choice for the diagnosis of breast disease and one of the easiest and most reliable non-invasive means of detection, relatively little pain, simple and easy to use, and high resolution, good repeatability, retained images can be used for before and after comparison, regardless of age, body shape restrictions, and is now used as a routine examination. It can detect breast lumps that cannot be touched by doctors, especially for large breasts and fatty breasts, its diagnostic accuracy can be as high as 95%. For stage T0 breast cancer (clinically negative), which has a few tiny calcifications as its only manifestation, it can only be detected and diagnosed at an early stage by soft X-ray examination.