For people who experience nighttime GERD symptoms, the left-side sleeping position has some of the strongest evidence behind it.
Research has found that people sleeping on their left side can have shorter periods of esophageal acid exposure and faster clearance of acid compared with sleeping on the right side or in a flat position. A systematic review and meta-analysis also concluded that current evidence supports a potential benefit from left-side sleeping for nighttime reflux.
So if you normally sleep on your right side and frequently experience nighttime heartburn, trying the left side may be a simple experiment.
It doesn't work for everyone, but it's an easy change that doesn't require medication or special equipment.
Why Might the Right Side Be Worse?
Research suggests that lying on the right side can increase acid exposure compared with lying on the left.
Several studies have observed more reflux or slower acid clearance in the right lateral position. One study of people with nighttime GERD found that right-side sleeping was associated with greater esophageal acid exposure and longer acid-clearance times than left-side sleeping.
This doesn't mean that everyone who sleeps on their right side will develop heartburn.
However, if you already struggle with nighttime reflux, moving toward your left side may be worth trying.
What About Sleeping Flat on Your Back?
Sleeping completely flat on your back may also allow reflux to become more noticeable for some people.
Research has found more frequent reflux episodes in the supine position compared with certain side-lying positions.
If lying flat makes your symptoms worse, elevating your upper body may be more helpful than simply adding another pillow underneath your head.
Try Elevating Your Upper Body
Another commonly recommended strategy for nighttime GERD is raising the head of the bed or using a wedge that elevates the upper body.
The National Institute of Diabetes and Digestive and Kidney Diseases recommends elevating the head during sleep by using a foam wedge or another appropriate method that raises the head and upper back.
The American College of Gastroenterology also recommends elevating the head of the bed for people experiencing nighttime GERD symptoms.
A wedge can be preferable to simply stacking pillows beneath your head because the goal is to create a gentle incline through the upper body rather than bending only at the neck.
Don't Eat Right Before Bed
Your sleeping position isn't the only factor that can influence nighttime reflux.
Eating shortly before lying down can make symptoms more likely, particularly after a large meal.
NIDDK notes that people with nighttime GERD symptoms may benefit from eating meals at least three hours before lying down or going to bed.
The American College of Gastroenterology similarly recommends avoiding meals within roughly two to three hours of bedtime.
Instead of having a heavy late-night meal, try giving your digestive system some time before getting into bed.
Pay Attention to Your Trigger Foods
Certain foods and beverages can make reflux symptoms worse for some people.
Commonly reported triggers include:
- Chocolate
- Coffee and other caffeinated drinks
- Alcohol
- Spicy foods
- High-fat foods
- Mint
- Citrus fruits
- Tomatoes
Not everyone reacts to the same foods, so there's no universal list that every person with reflux must avoid. Keeping track of what you eat and when symptoms occur can help identify your personal triggers.
A Simple Nighttime Routine for Reflux
If nighttime heartburn is bothering you, consider trying several habits together:
1. Finish dinner earlier
Aim to finish your evening meal at least a few hours before lying down.
2. Stay upright after eating
Give your body some time to digest your meal before getting into bed.
3. Try sleeping on your left side
This position has been associated with lower nighttime acid exposure in people with GERD.
4. Elevate your upper body
A properly positioned wedge or elevated head of the bed can help reduce nighttime reflux symptoms.
5. Identify your personal food triggers
Rather than eliminating every food commonly associated with reflux, pay attention to the foods that actually seem to trigger your symptoms.
Can Changing Your Sleeping Position Cure GERD?
No.
Changing your sleeping position can potentially reduce nighttime reflux symptoms, but it isn't a cure for GERD.
GERD can have multiple contributing factors, and treatment depends on the individual. Lifestyle changes may be enough for some people, while others may need medication or further medical evaluation.
Think of sleeping position as one useful piece of the puzzle rather than a replacement for medical treatment.
When Should You Talk to a Doctor?
Occasional heartburn isn't necessarily a sign of a serious condition. However, persistent or troublesome symptoms deserve medical attention.
Talk with a healthcare professional if your reflux symptoms don't improve with lifestyle changes or over-the-counter treatments.
You should seek medical advice promptly if you experience symptoms such as:
- Difficulty or pain when swallowing
- Persistent vomiting
- Unexplained weight loss
- Vomiting blood
- Black or tarry stools
- Significant or persistent chest pain
These symptoms can indicate complications or another condition that shouldn't simply be attributed to acid reflux.
Frequently Asked Questions
Which side should I sleep on if I have acid reflux?
For nighttime reflux, research generally favors the left side over the right side or lying flat. Left-side sleeping has been associated with lower acid exposure and faster clearance of refluxed material.
Is sleeping on the right side bad for everyone?
No. Sleeping on the right side isn't inherently harmful. However, studies in people with reflux have found greater acid exposure in the right-side position compared with the left.
Does elevating the bed help acid reflux?
It can. Elevating the upper body during sleep is a recommended lifestyle measure for people with nighttime GERD symptoms.
How long should I wait after eating before going to bed?
For people with nighttime reflux symptoms, NIDDK recommends eating meals at least three hours before lying down or going to bed.
Can extra pillows stop acid reflux?
Simply stacking pillows under your head isn't necessarily the best approach. A wedge that supports the upper body or properly elevating the head of the bed creates a more useful incline.
The Bottom Line
Your sleeping position won't magically eliminate acid reflux, but it may influence how much nighttime reflux you experience.
If heartburn tends to wake you up, try sleeping on your left side, avoid eating close to bedtime, and consider elevating your upper body. These simple changes are supported by evidence and are commonly recommended as part of nighttime reflux management.
And if reflux keeps happening despite these changes, don't simply learn to live with it. Persistent symptoms can be a sign of GERD and are worth discussing with a healthcare professional.
Sometimes, improving your nighttime routine starts with something as simple as turning onto the other side.