Which term best describes increased urine output at night?

The term that best describes increased urine output at night is "nocturia." Nocturia specifically refers to the condition where a person wakes up during the night to urinate, leading to increased frequency of urination when one would typically be sleeping.

This condition can occur due to various reasons, including fluid intake before bedtime, certain medical conditions, medications, or age-related changes in bladder function. Recognizing nocturia is important in clinical settings, as it may indicate underlying health issues such as heart failure, diabetes, or urinary tract infections.

In contrast, terms like oliguria refer to low urine output, anuria signifies the absence of urine production, and polyuria indicates an excessive amount of urine production during the day, none of which align with the description of increased urination specifically at night. Understanding these distinctions is crucial for accurate identification and management of urinary conditions.