Nocturia is defined as

• A. Excessive urination at night
• B. Frequent daytime urination
• C. Painful urination
• D. Decreased urine output at night

Answer: (A)

Nocturia centers on waking up during the night to urinate. It’s a nighttime symptom that disrupts sleep, defined by nighttime voiding rather than how much urine is produced overall. That’s why it matches “excessive urination at night” in the sense that the key feature is urinating during the night and the accompanying sleep disruption. The other options describe different problems: daytime urination suggests daytime frequency, painful urination points to dysuria, and decreased urine output at night implies oliguria, which is reduced production rather than the act of waking to void. Nocturia may be related to nocturnal polyuria or reduced bladder capacity, but the defining feature remains nighttime awakenings to urinate.