Sheet-like hypoechoic breast is usually associated with breast hyperplasia, breast fibroadenoma, breast cyst and other diseases. It is recommended that the cause of the disease be identified in the hospital immediately to avoid delay. 1. Mammary hyperplasia: Mammary hyperplasia is a common benign breast disease in clinic, which will cause breast flaky hypoechoicity because of the symptoms of breast pain, nodules or lumps, and some nipple overflow. 2. Mammary fibroadenoma: Mammary fibroadenoma is a common benign breast disease and is caused by abnormal sensitivity of breast fibroblasts to estrogen. It usually presents with symptoms such as a painless, mobile breast lump, which causes flaky hypoechoic breast. If you have such symptoms, please go to the hospital to find out the cause and follow up for observation. 3. Breast cyst: Breast cyst refers to the formation of round or oval fluid-filled cystic masses in the breasts, usually without obvious discomfort, and the patient’s main manifestation is a palpable lump in the breast, which causes breast flaky hypoechoic. If you have any of these symptoms, it is recommended that you go to the hospital immediately. Breast flaky hypoechoicity may also be caused by other reasons such as malignant tumors, if this situation occurs, it is recommended to go to the hospital in time to find out the cause of the disease and timely diagnosis and treatment.