Acquired renal cysts are acquired later in life, which is distinctly different from polycystic kidney formed by congenital heredity. Acquired renal cysts are generally caused by renal insufficiency, diverticula formed by renal tubules and other reasons, as follows: 1. Diverticula formed by renal tubules, commonly found in simple renal cysts, renal tubular diverticula generally become more and more frequent with age, so simple renal cysts become more and more prevalent with age, and generally do not require treatment, as long as regular follow-up. 2. Renal insufficiency It can also cause renal cysts, caused by the stimulation of renal insufficiency, this kind of renal cysts usually also do not need to be treated, if the renal cysts are too large, fluid extraction treatment can be given.