Waking at Night to Urinate: Why It Happens and What a Visit Can Check

What it involves

MedlinePlus explains that the body normally makes less urine at night, which lets most people sleep six to eight hours without getting up. Urinating more at night, also called nocturia, means waking from sleep to go, and it can disrupt the sleep cycle.

Who this is for

• Adults who wake more than once a night to urinate and feel tired the next day
• Men who also notice a weak stream or trouble starting to urinate
• Patients with diabetes, heart or kidney conditions who have noticed more nighttime trips
• People who take a water pill or other medicine and want to know whether the timing matters

What to expect

• Questions about how many times you get up, how much you pass each time and how much you drink in the evening
• A review of your medicines, caffeine and alcohol, plus any burning, back pain or fever
• Blood work and a urine test when the history calls for them, such as blood sugar and kidney checks
• A plan based on the cause, or a referral if a urologist or sleep specialist is the better next step

What counts as too much

A single trip at night is not unusual, and MedlinePlus says to contact a provider if waking to urinate continues over several days, if the number of trips bothers you, or if you have a painful or burning sensation or blood in the urine. The point is the effect on your life. If you are up three times and still feel rested, that is a different situation from one trip that leaves you unable to fall back asleep. Counting the trips for a week before the visit gives your provider a number to work with instead of an impression.

Everyday causes to rule out first

MedlinePlus puts fluids at the top of the list: drinking too much in the evening, and caffeine or alcohol with or after dinner. It also names a bladder or urinary tract infection and pregnancy. Moving the last large drink earlier and cutting evening coffee costs nothing and often shows within a few days whether the pattern changes. A burning feeling or fever alongside the night trips points toward infection instead, which is covered in the urinary tract infection care guide.

Medical conditions MedlinePlus links to it

The encyclopedia lists an enlarged prostate, chronic kidney disease, diabetes, heart failure, a high blood calcium level, diabetes insipidus and swelling of the legs among the conditions that can lead to nighttime urination, along with water pills. Men with a weak stream may want the enlarged prostate guide, and anyone with unusual thirst can read about excessive thirst. Because the list is wide, a first visit usually looks at blood sugar and kidney function before anything else.

Sleep and nighttime urination go both ways

MedlinePlus notes that waking often to urinate can be linked to obstructive sleep apnea and other sleep disorders, and that nocturia may go away once the sleep problem is under control. Stress and restlessness can also wake you. If you snore, stop breathing in your sleep or are sleepy in the daytime, mention it, and see the sleep apnea and snoring guide for what that evaluation involves. A person who wakes for another reason may simply notice a full bladder once awake.

How to prepare for the visit

MedlinePlus suggests keeping a diary of how much fluid you drink, how often you urinate and how much you pass each time, and recording your weight on the same scale at the same time each day. Bring the diary with your medicine list. Your provider will ask when the problem began, how often you urinate each night, what makes it better or worse, whether you have accidents or bedwetting, and whether you have increased thirst, back pain or fever. Those answers shape which tests make sense.

Tests and treatment

Tests MedlinePlus says may be done include blood sugar, kidney function and electrolyte blood tests, a urinalysis and a urine culture, and sometimes a voiding diary kept at home. Treatment depends on the cause. When a water pill is responsible, the encyclopedia says you may be told to take it earlier in the day. Please do not change a prescribed medicine on your own. The kidney function tests guide and the urinalysis guide explain two of these tests in plain language.

Sources

• MedlinePlus: Urinating more at night (medical encyclopedia)
• MedlinePlus: Urine and Urination (health topic)