Night peeing rises with age because anti-diuretic hormone production drops, and evening fluids, caffeine, and alcohol push it further.
Per Guy's and St Thomas' nocturia guidance, daytime ankle swelling rejoins the bloodstream when you lie down and becomes nighttime urine, and light sleepers notice bladders they would otherwise sleep through. Shift fluids earlier, cut evening caffeine and alcohol, prop swollen legs up in the afternoon, and empty before bed. Several nightly trips despite that, or nocturia with burning, cloudy or bloody urine, constant thirst, or snoring with gasping, deserves a GP: infection, diabetes, prostate problems, and sleep apnoea all present this way.
What to do
Common questions
Why do I pee more at night than during the day?
One trip is normal, especially with age; several trips means something is loading your nights. Guy's and St Thomas' nocturia guidance explains the main drivers: you produce less anti-diuretic hormone as you get older, so your kidneys concentrate urine less effectively at night; fluid drunk close to bedtime has to go somewhere; caffeine and alcohol irritate the bladder and change sleep patterns; and fluid that pooled in your legs and ankles during the day re-enters your bloodstream when you lie down, arriving at the kidneys right on schedule for a 2am trip. Waking for other reasons matters too: people who sleep lightly simply notice a half-full bladder they would sleep through otherwise. The fixes map to the causes: shift drinking to earlier in the day, cut evening caffeine and alcohol, prop your legs up or wear compression socks in the late afternoon if your ankles swell, and empty your bladder right before bed. See a GP if you are up several times nightly despite those changes, or if it comes with pain or burning, cloudy or smelly urine, blood, constant thirst, or snoring with gasping pauses, since bladder infections, diabetes, prostate problems, and sleep apnoea all show up as nocturia and all are treatable.