Breast physical examination from the age distribution, the selection of the appropriate means of examination should be in a ladder. Women should start self-examinations at the age of 14, and go to a breast specialist immediately if a lump is detected. 2. After the age of 20, women should have an annual color B-ultrasound in addition to self-examination. After the age of 30, women should have a color B-ultrasound once every six months in addition to self-examination. You can choose to do blood test for CA153 and other tumor indicators. 4.After the age of 35 or 40, women should have color B-ultrasound once every six months and mammography once a year, in addition to self-examination. 5.Checking instruments: Color ultrasound and mammography have mutual advantages and disadvantages and cannot replace each other. There is no best, only the most suitable. Each patient’s breast condition is different and needs individualized selection. 6, opposed to the use of infrared for breast examination. 7, the best time to check: three to seven days after the clean period this time to check the best. However, as long as it is not in the premenstrual period, the examination is still possible.