There are the following breast lumps: hyperplasia fusing into a mass fast, mastitis, breast cysts, benign breast tumors, malignant breast tumors, and fatty necrosis of the breast. Symptoms: Most breast lumps do not extend symptoms: Most breast lumps are not accompanied by pain, a small percentage of patients come to the hospital because of pain and then the lump is found. Signs: benign lumps: clear borders, good mobility, regular shape, smooth surface, envelope, slow growth, no metastasis, no blood flow signal on ultrasound, no calcified spots on mammography. Malignant mass: unclear boundary, bad mobility, irregular morphology, unsmooth surface, no envelope, rapid growth, easy to metastasize, abundant blood flow signal on color ultrasound, and calcified spots on mammography. Pathological examination is the gold standard for the diagnosis of benign and malignant!