Breast cancer examination methods are as follows: 1. Self-examination: To examine breast cancer by touching the breast with the hand, the examination method is to touch the breast counterclockwise to see if there is a lump, and to judge the size, hardness and activity of the lump after touching it. 2. Ultrasound or mammogram: If a lump is found, it is recommended to have further ultrasound or mammogram examination. Ultrasound and mammography can usually determine whether breast cancer is identified through ultrasound description. There is an index called BI-RADS, if the index is greater than four, it is usually recommended to have a puncture biopsy to determine whether it is breast cancer.