Which factor could contribute to urinary retention in elderly males?

Prostate enlargement is a common condition in elderly males and significantly contributes to urinary retention. As men age, the prostate gland can increase in size, a condition known as benign prostatic hyperplasia (BPH). This enlargement can compress the urethra, making it difficult for urine to flow from the bladder, leading to retention. The pressure from the enlarged prostate impedes the normal function of the bladder, preventing the complete emptying of urine.

In contrast, factors such as high activity levels generally promote urinary function and do not typically lead to retention. Fluid overload can affect urine production but does not usually cause retention directly in the presence of prostate issues, and kidney disease may lead to various urinary symptoms, but it is not as directly linked to the mechanical obstruction caused by an enlarged prostate. Thus, understanding prostate health is crucial for recognizing potential urinary retention issues in elderly males.