what is the main cause of prostate enlargement

The main cause of prostate enlargement is unknown, but it is believed to be linked to hormonal changes that occur as a man gets older. The prostate gland grows naturally as men age, and the cells of the prostate gland begin to multiply, causing the prostate to enlarge. An enlarged prostate can place pressure on the bladder and the urethra, which is the tube that urine passes through, and this can affect how you pee and may cause difficulty starting to pee, a frequent need to pee, and difficulty fully emptying your bladder. Other possible causes of urinary symptoms that are similar to those caused by an enlarged prostate include urinary tract infection, inflamed prostate, narrowing of the urethra, scarring in the bladder neck due to past surgery, bladder or kidney stones, problems with nerves that control the bladder, and cancer of the prostate or bladder.