I read in an article, by Round Town News, that experts refer to benign prostatic hyperplasia (BPH) as being a benign tumor. The article goes on to say "As the prostate enlarges, it causes the gland to press against the urethra. The bladder wall becomes thicker and easily irritable and begins to contract even when it contains only small amounts of urine, causing more frequent urination, especially at night. Eventually, the bladder weakens and loses its ability to empty itself, so some of the urine remains in the bladder. The narrowing of the urethra and partial emptying of the bladder may cause other problems, due to accumulation of bacteria and residuals in the bladder, such as urine tract infections or residual crystallization and diverticulum’s."