Breast ultrasound is often referred to as breast ultrasound, which is more suitable for young women. Its advantage is that it can not only detect whether the lump inside the breast is cystic or solid, but also measure the blood flow of the lump, which can help determine the benignity or malignancy. Mammography is a mammogram that detects tumors based on the difference in density between normal breast tissue and breast lumps. Younger women have denser breast tissue and are therefore less suitable for mammograms, while older women have looser breast tissue, so mammogram screening is more advantageous. In addition, the concentration of breast cancer tumor markers in the blood can also be checked as an adjunct to breast cancer screening, such as glycoantigen 153 and glycoantigen 125. Self-examination of the breast is also a better screening tool. Self-examination of the breast is to palpate the breast at home in front of a mirror according to the established method. Regular self-examination can increase the detection rate of early breast cancer, and this method is economical, convenient and non-invasive to the human body.