Cysts in both kidneys are called multiple renal cysts, mostly caused by factors such as renal tubular diverticulum, congenital, hereditary, etc. The following is a specific analysis: First, renal tubular diverticulum, which can cause cysts in both kidneys, the onset of which is characterized by an increase in the number of renal tubular diverticula with age and a higher probability of renal cysts. Second, congenital and hereditary factors, if there are cysts in both kidneys, can be caused by congenital and hereditary factors, the onset is characterized by a family history, the patient’s elders may have a history of kidney cysts, and patients with kidney cysts can also be accompanied by cysts in the liver, pancreas and other organs, that is, polycystic kidneys. If there are cysts in both kidneys, whether caused by renal tubular diverticulum or congenital or hereditary factors, if the patients do not have any clinical manifestations and the laboratory tests are normal, they can be temporarily left untreated and can be reviewed regularly.