Breast cancer is a common malignant tumor in women, which is a serious threat to women’s health. In China, breast cancer has the following characteristics: firstly, the mortality rate is growing fast, and secondly, the rate of breast-conserving surgery is low. The reason for this is mainly because of the low rate of early detection and diagnosis of breast cancer. Breast cancer has a chance to be cured, but the treatment of breast cancer is based on early diagnosis, so it is better for women to know the early symptoms of breast cancer. Early symptoms of breast cancer that women must know 1. Painless breast lump is one of the early symptoms of breast cancer. Patients can palpate a lump of bean size, hard and movable, without obvious pain, and a few have paroxysmal hidden pain, dull pain or stabbing pain. Some of the early symptoms of breast cancer are not obvious, and the lump is not yet palpable, but there will be breast discomfort, especially postmenopausal women will feel mild pain and discomfort in one side of the breast, or sinking, soreness and swelling in the back of one shoulder, even involving the upper arm of that side. Breast shape change is also a symptom of early breast cancer. You can find the skin at the breast lump is elevated, some breast skin is orange peel, or even discoloration or eczema-like changes. Changes in the nipple are also a symptom of early breast cancer, and dimpling of the breast skin can be seen. In addition, the nipple near the center is accompanied by nipple retraction nipple erosion and nipple asymmetry. How can women check themselves for breast cancer? Take off the top and face the mirror to check whether there is any overflow of nipple, skin wrinkling, depression, nipple retraction, whether the level of bilateral nipples is the same and whether there is any change in the whorl. Lift your left arm, put your right index, middle and ring fingers together, and gently press the left breast areas with your fingers to feel whether there are lumps.