Hypoechogenicity of the breast means that the density of the breast is lower than the density of the surrounding normal breast tissue, so the area is hypoechoic on ultrasound. Most of the breast hypoechogenicity belongs to breast diseases, most of them are benign lesions, such as breast adenopathy, breast cysts, breast nodules, hyperplastic breast areas and other diseases, all of which can be shown as hypoechoic areas under ultrasound examination. If these lesions are accompanied by obvious pain, you can consider taking prozac, xihuangwan, xiaojinwan and other medications, and if the results are not good, you can consider surgery. If the nipple is overflowing with blood or the lesion area is expanding, you can consider mammography to further clarify the cause, and if necessary, surgery.