What are the primary causes of frequent urination at night?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Frequent urination at night, known as nocturia, is a common condition where you wake up multiple times to urinate. Causes of nocturia include aging, underlying medical conditions such as diabetes, urinary tract infections, an overactive bladder, or prostate issues, as well as lifestyle habits like drinking fluids before bed or consuming alcohol and caffeine in the evening.

Because nocturia can signal a range of issues—from simple habits to conditions that need medical attention—it's important to understand what may be driving your symptoms. Take a free, instant, online symptom check to better understand what's going on and confidently navigate your next steps.

Reviewed for medical accuracy: 07/15/2026

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Explanation

Frequent urination at night, called nocturia, is common, especially in older adults. It can be caused by several factors.

Aging: As people age, their bodies produce less of the hormone that helps concentrate urine, leading to more frequent urination.
Medical Conditions: Conditions like benign prostatic hyperplasia (BPH) in men can lead to nocturia. BPH causes the prostate to enlarge, pressing on the bladder and urethra, making it difficult to fully empty the bladder.
Nocturnal Polyuria: This condition involves producing too much urine at night, which can disturb sleep.
Lifestyle Habits: Drinking lots of fluids, especially caffeine or alcohol, close to bedtime can increase nighttime urination.

Managing nocturia often involves lifestyle changes, like reducing evening fluid intake, and addressing any underlying medical conditions. If you're experiencing frequent nighttime urination, try our free AI symptom checker to better understand potential causes and find the right treatment approach.

(References)

Kallas HE, Chintanadilok J, Maruenda J, Donahue JL, & Lowenthal DT. (1999). Treatment of nocturia in the elderly. Drugs & aging, 10641954.
Asplund R. (2004). Nocturia, nocturnal polyuria, and sleep quality in the elderly. Journal of psychosomatic research, 15172208.
Oelke M, Fangmeyer B, Zinke J, & Witt JH. (2018). [Nocturia in men with benign prostatic hyperplasia]. Aktuelle Urologie, 30086589.

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