Acid that comes up the moment you lie down: three things you can change tonight

Stacking pillows may actually backfire

Key points in 30 seconds

1. When you lie down, the esophagus and stomach become level. It's like a border with the threshold removed, so in people whose stomach entrance is a bit loose, contents easily cross over.
2. On top of that, swallowing drops sharply during sleep. Swallowing saliva is the cleanup job that washes acid that has come up back down. Night is a time when it's easy for acid to come up and hard to wash it away.
3. Raising the head of the bed reduced the time the esophagus was exposed to acid from 21% to 15%. However, stacking pillows is not the way to do it.
4. Move dinner earlier. Eating dinner late increased acid exposure while lying down by 5.2 percentage points compared with eating early.
5. If you've gained weight, that goes on the treatment list too. In weight loss trials, acid exposure time went down (in one trial, from 5.6% to 3.7%).

What we often hear

• "I'm fine during the day, but it comes up as soon as I lie down."
• "I sleep with two or three pillows stacked up."
• "Some nights I'm only comfortable sleeping propped up on the sofa."
• "The acid makes my throat raw and I can't sleep."

About 10 minutes after you pull up the covers, something hot rises from the pit of your stomach. If nights when you're only comfortable sleeping sitting up keep repeating, today's post should help.

Why does it come up when you lie down?

The answer is gravity.

While you're standing, gravity is on your side. The stomach's contents are pressed downward, so even if the door at the stomach entrance is a little loose, it's hard for them to cross over.

But when you lie down, the esophagus and stomach become level. It's like a border with the threshold removed, so in people whose door is loose, contents easily cross over.

One more thing adds to this. While you're asleep, the number of times you swallow saliva drops sharply. Swallowing saliva is the cleanup job that washes acid that has come up into the esophagus back down.

Easy to come up, hard to wash away. That's why it gets worse at night.

One: don't stack pillows; raise the head of the bed

There's a study finding that just raising the head of the bed so the whole upper body slopes reduced the time the esophagus was exposed to acid from 21% to 15%.

How you do it matters here. Stacking several pillows just bends your neck, and your belly actually gets folded and squeezed, which can backfire.

The right way is to put sturdy blocks under the legs at the head of the bed, or use a long wedge cushion that supports your whole upper body. Picture your whole torso, not just your neck, lying on a gentle slope.

Two: move dinner earlier

Eating dinner late, close to bedtime, increased acid exposure while lying down by 5.2 percentage points compared with eating early. It's like removing the border threshold while your stomach is full of food.

We recommend widening the gap between dinner and lying down, usually to two or three hours or more.

If late-night snacking is a habit, instead of telling you to quit, we'll change it like this: eat earlier, or lie down later. The gap is the key.

Three: if you've gained weight, that goes on the treatment list too

In clinical trials of weight loss, the esophagus's acid exposure time went down. In one trial, it went from 5.6% to 3.7%.

That's because when pressure inside the belly drops, the force itself that pushes stomach contents upward goes down.

If the time your reflux started overlaps with the time you gained weight, that's quite likely not a coincidence.

One more: try lying on your left side

The stomach isn't symmetrical; it's a pouch that bulges to the left. Lying on your left side puts the stomach entrance above the contents, and there are reports that reflux is less than when lying on your right side.

The weight of the evidence is lighter than for the three above. But it costs neither money nor effort, so it's worth trying.

On the other hand, two things not to do

Drinking before bed. Alcohol works to loosen the door at the stomach entrance. For people whose reflux comes up at night, drinking late is like going to sleep with the door open.

Stopping the stomach medicine you've been taking on your own and toughing it out. Stopping suddenly can make symptoms worse through rebound. We covered that in detail in the previous post. Any adjustment should always be discussed with whoever prescribed it.

With these signs, testing comes before tips

Trouble swallowing or pain when swallowing, unintended weight loss, repeated vomiting, black or bloody stools, anemia, and symptoms that started for the first time after middle age.

If even one applies to you, getting an endoscopy comes first. The same goes if you've never been tested or it's been a long time.

We go through this together in this order

First, we check for warning signs and your endoscopy history. If you need a test, pointing you to a testing facility comes first.

Next, we sort out whether the timetable of your symptoms is the nighttime type or the after-eating type, and set the lifestyle prescriptions above as concrete homework: the height of the head of the bed, the gap between meals and bedtime, even a weight goal.

Along with this, we add acupuncture and herbal medicine treatment based on abdominal diagnosis and testing. There are studies that tested this in symptoms not controlled by medication, and we tell you the expectations as they are, without inflating them.

Then, at a set point, we compare your symptom records to check whether you're getting better. The order in which we look at digestive problems is laid out in our reflux care page.

Two things to do starting tonight

A night when you sleep lying flat with one pillow. A morning that greets you in bed, not on the sofa. What we aim for is that ordinary night.

Progress varies from person to person, depending on the type of symptoms, body weight, and the medication you take. But what you can start tonight is clear.

Write down the time you ate dinner and the time you lay down. And look for a way to raise the head of your bed.

Bring a week of notes with you, and we'll make the rest of the plan together.

For questions or appointments, message us in English through the messenger at the bottom right of the page, or call +82-53-716-1175.

The sources for the studies on the head of the bed, meal timing and body weight are in the director's column Acid that comes back up when you stop the medication.