Breast lumps can be divided into benign and malignant, and the identification method is mainly based on the age of prevalence, nature of the mass, and relevant imaging examinations, etc.: 1. Age of prevalence: usually the high prevalence of benign is in young women, and malignant is in middle-aged women; 2. Nature of the mass: generally benign is more regular, most of them are round or oval-shaped pieces, tough, smooth, with clear borders and good mobility, most of them are solitary. Most of them are solitary, but a few can be multiple, usually without specific clinical symptoms, mostly found inadvertently or during physical examination. Malignancy is an irregular mass with some blurred borders, generally poor mobility, and may be accompanied by enlarged lymph nodes, nipple overflow and other symptoms; 3. Breast tumor malignant after mammography, can see the fine calcification foci in it, after breast ultrasound examination, can make a judgment on the nature of the lump. If malignancy is suspected and the above methods cannot be clarified, the lump can be removed by puncture and pathological examination.