Some of the early symptoms of breast cancer are as follows: 1. Although some early breast cancer patients are not yet able to touch a definite lump in the breast, they often have local discomfort, especially postmenopausal women, who sometimes feel mild pain and discomfort in one breast, or sinking, soreness and discomfort in the back of one shoulder, even involving the upper arm on that side. 2. A lump the size of a pea can be palpated in the early breast, which is hard and movable. Generally there is no obvious pain, a few have paroxysms. The skin of the lump is elevated, and in some cases the skin is orange peeled, or even edematous, discolored, or eczema-like. 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 “orange peel”). 5. Nipple overflow: the overflow is bloody, plasma 6. Regional lymph node enlargement, most common in the 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 ranges 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, and women who have used estrogen replacement therapy for more than 10 years should be closely monitored and genetic screening should be performed if available. Because of the small size of the breasts and the small area exposed to estrogen, people with small breasts are relatively less likely to get this disease, but there is no shortage of such cases, and it is inaccurate to say that only plump people will get breast cancer. If you find any changes, you should go to the hospital for examination as soon as possible.