Benign prostatic hyperplasia can cause which change in urination?

• A. Increase urine production
• B. Obstruct urine flow, causing hesitancy and weak stream
• C. Decrease residual urine
• D. Increase bladder capacity

Answer: (B)

Enlargement of the prostate presses on the urethra and blocks the normal flow of urine. This outlet obstruction makes it hard to start urinating and reduces how forcefully urine is expelled, leading to hesitancy and a weak, sometimes intermittent stream. The problem isn’t that the kidneys are producing more urine; they’re producing a normal amount, but the bladder isn’t emptying efficiently because of the obstruction. That often leaves more urine in the bladder after voiding (increased residual urine) and can progress to retention. Other choices don’t fit because they describe changes in production or capacity rather than flow obstruction and incomplete emptying.