Ask a man why he gets up twice a night and he will tell you it is his prostate. Ask his physician and, often enough, the answer is the same. Then the prostate is treated, the stream improves, and he still gets up twice a night.
The reason is that waking at night to urinate is not one condition. It is at least three, sharing a single symptom, and the treatment for each is different. The most common failure in treating it is that the clinician treats the organ they specialise in rather than the mechanism the patient actually has.
The three doors
Reduced functional capacity. The bladder holds less than it should, because of obstruction from an enlarged prostate, because the bladder muscle has become overactive, or because of inflammation. This is the mechanism people assume they have, and it is the one that responds to urologic treatment.
Nocturnal polyuria. The kidneys produce too much urine at the wrong hour. The bladder is working normally and is simply being asked to handle a volume it was not designed to hold overnight. Causes include fluid and alcohol timing, heart failure, leg swelling that reabsorbs when you lie down, poorly controlled diabetes, diuretics taken in the evening, and the age-related loss of the night-time rise in antidiuretic hormone. No prostate procedure will touch this.
Primary sleep disruption. You wake first, and the bladder is what you notice once awake. This sounds like a technicality and it is the most consequential of the three, because the most common cause is obstructive sleep apnea. Apneic episodes generate large swings in pressure inside the chest, which stretch the heart and trigger release of natriuretic peptide, which tells the kidney to produce urine. The patient experiences it as a bladder problem and presents to a urologist. He does not have a bladder problem. He has untreated sleep apnea, and the urologist is the physician he happened to come to see.
Three nights of a bladder diary settles most of this
Record what you drink and when, what you pass and when, and roughly how much. If the volume passed between going to bed and getting up is more than about a third of your daily total, you have nocturnal polyuria. If each night-time volume is small, capacity is the issue. If you wake without much urge and pass little, look at sleep. How we read one.
The cost is sleep, not urine
This is the part that changes how the condition should be thought about. The harm from nocturia is not delivered through urine. It is delivered through the destruction of sleep architecture.
Deep, slow-wave sleep is front-loaded into the first half of the night. It is also the most vulnerable to interruption and the slowest to re-enter once broken. A trip to the bathroom at two in the morning does not remove an average slice of the night; it removes a disproportionately restorative one, and whether you get back into that stage is neither guaranteed nor quick. Two awakenings can cost considerably more than two awakenings' worth of time.
Which means a treatment that reduces the volume you pass without restoring uninterrupted sleep has not delivered the thing that mattered. It is also why so many men report feeling no better after a technically successful procedure, and why the outcome we ask about at follow-up is whether you are sleeping through, not whether your flow rate improved.
The sedative trap
Faced with broken sleep, the natural response is to sleep more deeply: a prescription hypnotic, an over-the-counter antihistamine sleep aid, or a drink before bed. Each of these makes the situation more dangerous rather than less.
You still have to make the trip. Now you make it sedated, with impaired balance and slowed reactions, in the dark, often on a hard floor. Falls at night in older adults are a leading route into fracture and everything that follows from it. The antihistamine sleep aids add a second problem: they are anticholinergic, and in a man with an enlarged prostate they can precipitate urinary retention.
Nothing here is advice to stop a medication someone has prescribed for you. It is a reason to bring the whole list — prescriptions, over-the-counter aids, and alcohol — to the appointment, because reviewing it is often the highest-value thing done at that visit.
What we do about it
We classify before we treat. That means a bladder diary, a focused history including snoring, witnessed pauses in breathing, morning headache and daytime sleepiness, a medication review, an examination, a check that the bladder empties, and blood work where the picture suggests diabetes, kidney or cardiac contributions. Where sleep apnea is suspected, we arrange testing, because treating it improves the nocturia, the blood pressure and a good deal else.
Where the mechanism is capacity, we treat the bladder or the prostate. Where it is nocturnal polyuria, we work on fluid and alcohol timing, diuretic timing, leg elevation and compression during the day, and the underlying cardiac or metabolic cause. Where it is sleep, we treat the sleep. Most patients have some of more than one, and the diary is what tells us the proportions.
This is the subject of a full section of UroLongevity, and it is the basis of our nocturia and sleep programme.
Questions patients ask
Is once a night abnormal?
Once is common and, for most people, not worth treating unless it is disturbing your sleep or your day. Two or more, or one that leaves you unable to get back to sleep, is worth sorting out — and it is the effect on sleep rather than the count that decides.
Should I just stop drinking after six?
It helps if your diary shows a large evening intake, and it is a reasonable thing to try. If the volume is high all night regardless of what you drink, the problem is not intake and restricting fluids will make you thirsty without fixing anything.
I snore and I am up twice a night. Is that connected?
Very likely. Sleep apnea causes nocturia through pressure changes in the chest and the hormonal response to them, and men with this combination are frequently treated for their prostate for years first. Snoring, daytime exhaustion and waking to urinate belong in the same conversation.
Will a prostate procedure fix it?
It will if the mechanism is reduced capacity from obstruction. It will not if the mechanism is nocturnal polyuria or disrupted sleep, and this is the most common source of disappointment after an otherwise successful procedure. Establishing which one you have first is the point.
Is a sleeping tablet reasonable in the meantime?
It carries a real risk, because you still have to get up and you will be doing it sedated. Falls at night are how a manageable problem becomes a fracture. Bring everything you take, including anything bought over the counter and any evening alcohol, to the appointment.
Make an appointment
Manhattan (212) 991-9991 · Forest Hills (718) 360-9550 · same-week visits and most major insurance accepted.