Feeling a hard lump in the chest, that is, noticing a hard lump in the breast, should prompt a visit to the hospital for a breast color ultrasound. There are also many causes, and the disease varies from age to age. For young patients, breast fibroids are very common and are also a benign disease. In middle-aged and older patients, if there is a painless mass in the breast gland, the possibility of a malignant breast tumor is not excluded. Ultrasonography may also show irregular hypoechoic breast glands or lumps with uneven density, and there may be burrs or lobular changes, and some patients may even have nipple discharge. If necessary, it can be further combined with percutaneous fine-needle aspiration, or lesion excision, frozen pathology, the occurrence of breast gland diseases and the body’s hormone level changes are related to, mainly estrogen and progesterone levels, in addition to a certain degree of familial genetic predisposition and the influence of the acquired environmental factors.