Principal reasons for frequent urination Continued (12) Frequent urination in enlarged prostate:Nearly 80% senior citizens after the age of 60 years suffer from enlarged prostate.The urethra is a tube through which urine leaves the body. It empties urine from the bladder.Urine flows out of the bladder and leaves the body through the urethra. The part of the urethra that is closest to the bladder is called the proximal urethra. The part that is closest to where the urine leaves the body is called the distal urethra.Benign prostrate enlargement (BPH) or Benign prostate hypertrophy(BPH):The cause of prostate enlargement is unknown, but