In some men, the bladder outlet is obstructed by an enlarged prostate caused by prostate cancer or benign prostatic hyperplasia. Symptoms, which begin slowly and progressively get worse, may include:
The bladder outlet may also be obstructed by:
In these cases, symptoms have a slower onset. The force of the urinary stream slowly weakens, and there may be blood in the urine.
Bladder stones, which often form if the bladder outlet is obstructed, can worsen the condition. This usually causes a sudden, very painful blockage of urine.