Cystic solid nodules are diagnosed under ultrasonography, and the meaning of cystic solid nodules in breast usually refers to diseases such as cystic hyperplasia of the breast, breast cysts, fibroadenoma of the breast, and breast cancer. 1. Breast cystic hyperplasia: patients with breast cystic hyperplasia, when undergoing ultrasonography, often have the diagnosis of cystic solid nodules, considerations and endocrine disorders, mental and emotional factors related to the role of estrogen in particular will occur under the role of breast epithelial overgrowth, the patient will have breast pain and nipple discharge symptoms. 2. Breast cysts: if the patient has breast cysts, usually there will be cystic lumps in the breast area, most of them are seen in premenopausal women, which belong to benign lesions, and they are considered to be related to the tiny malfunction in the degeneration of the normal lobules, and usually there is no obvious symptom, and a few of them will have acute inflammation when they are secondary to bacterial infections. 3. Breast fibroadenoma: it is a painless tumor with smooth surface and clear boundary, which is caused by the abnormal sensitivity of breast fibrous tissue to estrogen. Under ultrasonography, cystic solid nodules will be found, and there is no obvious symptom in general, and some patients will have pressure and pain when the warts increase in size. 4. Breast cancer: this is a disease caused by uncontrolled proliferation of breast epithelial hyperplasia, which is considered to be related to estrogen, radiation therapy and genetic factors. In the early stage of ultrasonography, cystic solid nodules will be found in the breast, and the symptoms are not particularly obvious in the early stage, and distant metastasis of the cancer cells will occur in the late stage, and undesirable lesions will appear in multiple organs. In addition, breast inflammation and other causes can also lead to the above situation. Patients are advised to cooperate with doctors for examination as soon as possible, and then do targeted treatment, so as not to delay the condition.