Renal cysts are common in clinical practice, and several simple cysts, which are small in size, mostly do not need to be treated. If you know you have a kidney cyst and the cyst is small and the doctor assesses that no treatment is needed for the time being, you should have regular physical examinations. If the following symptoms appear, you should seek medical attention and surgical treatment if necessary: 1. The review reveals that the cyst is getting larger and larger renal parenchyma or renal pelvis or calyces are obviously compressed, or malignancy is suspected on imaging. 2, the emergence of frequent urination, urinary urgency, painful urination or abnormal urine laboratory results, repeated urinary tract infections. 3.Pain in the lower back and abdomen after strenuous activity or body collision. 4.Recent increase in blood pressure without obvious cause. 5.The need to take the initiative to inform the doctor of the history of renal cyst when hospitalized for other diseases. When the above situation occurs, you should go to the urology department of the hospital at the first time, conduct abdominal CT and other necessary examinations, evaluate the cyst size, kidney function, urinary routine, etc., and choose the best treatment plan according to the specialist’s advice.