What happens in BPH?
In BPH, the prostate gland grows in size. It may compress the urethra which courses through the center of the prostate. This can impede the flow of urine from the bladder through the urethra to the outside. It can cause urine to backup in the bladder (retention) and the need for frequent urination. If severe enough, complete blockage of the urethra can occur, which can injure the kidneys.