Waking up to urinate at night is called nocturia. It becomes more common with age, but frequent nighttime urination isn’t something you should automatically dismiss as “just getting older.”
Common reasons
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Drinking a lot of fluid in the evening, especially tea, coffee, or alcohol.
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Enlarged prostate in men, which can cause frequent or weak urination.
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Overactive bladder or urinary-tract problems.
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Diabetes, where high blood glucose can increase urine production and thirst.
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Leg or ankle swelling — fluid can return to the bloodstream when you lie down and subsequently be excreted by the kidneys.
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Certain medications, particularly diuretics (“water pills”).
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Sleep disorders, including sleep apnea.
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Heart or kidney conditions, which can alter fluid balance.
What you can try
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Reduce large amounts of fluid 2–4 hours before bedtime, while still drinking adequately during the day.
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Limit caffeine and alcohol in the evening.
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Empty your bladder immediately before going to bed.
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If your legs swell, discuss elevating your legs earlier in the day with your clinician.
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If you take a diuretic, don’t change the timing yourself—ask your prescriber whether taking it earlier is appropriate.
When to get checked
If you’re regularly waking two or more times a night, or the problem is new or worsening, discuss it with a healthcare professional. Seek prompt care for blood in the urine, painful urination with fever, inability to urinate, or severe flank/back pain.
A simple urination/fluid diary for several days can be very helpful in figuring out what’s causing the problem.
