A hypoechoic breast nodule is an ultrasound description of a breast lesion that causes the corresponding condition, including breast fibroadenoma, breast cancer, and cysts. 1. Breast fibroadenoma: the corresponding lesion can be manifested as hypoechoic, usually with smooth edges, not rich in blood supply, and clearly demarcated from the surrounding tissues. 2. Breast cancer: Breast cancer can also be hypoechoic, but it is usually irregular in shape, rich in blood supply and poorly demarcated from the surrounding tissues. 3. Breast cysts: generally most of them are liquid hypoechoic, with clear boundaries, and the whole lesion has no obvious blood flow supply. If you find breast nodule hypoechoic mass, accompanied by local tissue abnormalities, and bloody overflow, you need to consult a doctor for timely observation and standardized treatment after diagnosis, to avoid delays in the condition.