Breast hyperplasia with hypoechoic foci is a diagnosis of the condition of the breast by ultrasonography, which needs to be combined with clinical symptoms and other examinations to make a comprehensive judgment. If the ultrasound examination reveals that the breast gland is dense and has little fat content, and abnormal foci are found inside the gland, and the echoes of the corresponding foci are low in contrast to the gland, then the ultrasound diagnosis suggests breast hyperplasia with hypoechoic foci. Breast hyperplasia itself is related to congenital development and hormonal stimulation, while hypoechoic foci are mainly indicative of internal lesions, such as cysts and fibroids. Further investigation needs to be combined with clinical symptoms and magnetic resonance imaging (MRI) to make a comprehensive judgment. The lesion itself is accompanied by nipple discharge, along with the surrounding skin condition, and the MRI suggests that there is a possibility of malignancy, which requires timely medical observation and, if necessary, coarse needle puncture, minimally invasive biopsy, or surgical excision.