We should prevent the occurrence of breast cancer in early prevention, early detection, early diagnosis and early treatment. Although some early breast cancer patients can not yet touch a clear lump in the breast, they often have local discomfort, especially postmenopausal women, who sometimes feel mild pain and discomfort in one breast, or sinking and soreness in the back of one shoulder, even involving the upper arm of that side. 2, early in the breast can be touched in the size of a bean lump, hard, movable. Generally there is no obvious pain, a few have paroxysmal hidden pain, dull pain or stabbing pain. 3.Changes in breast appearance: the skin at the lump is seen to be elevated, some local skin is orange peel-like, or even edema, discoloration, eczema-like changes, etc. 4. The nipple is near the center with nipple retraction. The skin of the breast is mildly depressed (medically called “dimples”), the nipple is eroded, the nipple is asymmetrical, or the skin of the breast is thickened and thickened, and the pores are enlarged (medically called “cellulite”). 5, nipple overflow: special attention should be paid to further examination when the overflow is bloody or plasma blood. 6. Regional lymph node enlargement, with the most common being ipsilateral axillary lymph node enlargement. If the supraclavicular lymph node is enlarged, it is already in advanced stage. In addition, estrogen is one of the prerequisites for the development of breast tumor. The onset of breast cancer varies from 18 to 70 years old, mostly between 30 and 60 years old, especially the reproductive period and menopause are the high incidence stages of female breast cancer. The early symptoms of breast cancer are mainly manifested in the above six aspects, the early symptoms of breast cancer are not very obvious, so women should pay more attention to the health of their breasts in general, and it is better to have a breast examination once a year; prevention of breast cancer is important.