Breast cancer generally cannot be self-checked, and it is recommended to go to the hospital for mammography, ultrasonography, pathology examination, etc., which is beneficial to the diagnosis of the disease. Breast cancer belongs to malignant tumors, and early symptoms such as nipple change, areola change and breast lump may appear, but the disease cannot be clearly diagnosed from the symptoms, so it is impossible to carry out self-examination. You should actively consult a doctor for scientific and standardized examination to confirm the diagnosis of breast cancer, and the examination items include breast ultrasound, mammography, MRI, pathology examination and so on. The earlier the breast cancer is detected, the better the prognosis is. When there are abnormal manifestations such as nipple change, areola change, breast lump, etc., it is necessary to pay attention to them and carry out examination as early as possible, so as to achieve early detection and early treatment, and improve the prognosis.