Cystic lumps in the breast are a common symptom and are commonly associated with breast cysts. If the cysts are small and the cyst fluid is hypoechoic and uniform and there is no obvious discomfort, you can observe and follow up more. If the cystic fluid is found to be unevenly echogenic or has an obvious irregular shape, further surgery is recommended to remove the cyst and send it for pathological examination, as a few cysts have the possibility of malignancy. In addition, cystic masses in the breast may also be caused by breast hyperplasia, as the breast is affected by hormone levels, excessive hyperplasia and dilation of the breast ducts can also lead to cystic masses, which change with the symptoms of breast hyperplasia, and after the end of menstruation the symptoms of breast hyperplasia are relieved and the cystic masses can disappear.