Benign prostatic hyperplasia (BPH) is a benign, noncancerous enlargement of the prostate gland. BPH evolves slowly over time—generally beginning when a man is 30 and then evolving slowly leading to noticeable symptoms after age 50. The most common symptoms will present themselves when the enlarged prostate gland eventually impedes or blocks the flow of urine from the bladder through the urethra to the outside. A man will generally feel the urge to urinate frequently both day and night followed by a persistently slow urine flow while having difficulty starting the urination stream. If not treated, more serious problems such as urinary tract infections and a complete blockage of the urethra could occur which could injure the kidneys. BPH is extremely common. Half of all men over 50 develop symptoms, but only 10% need medical or surgical intervention.