When the prostate enlarges, it may constrict the flow of urine. Nerves within the prostate and bladder may also play a role in causing the following common symptoms:Urinary frequency - Increased in number of micturitionUrinary urgency - urge to pass immediately after getting the sensation of urinationNocturia - Needing to get up frequently at night to urinateHesitancy - Difficulty initiating the urinary stream; interrupted, weak streamIncomplete bladder emptying - The feeling of persistent residual urine, regardless of the frequency of urinationStraining - The need strain or push to initiate and maintain urination in order to more fully empty the bladderDecreased force of stream - The subjective loss of force of the urinary stream over timeDribbling - The loss of small amounts of urine due to a poor urinary stream as well as weak urinary stream.