Acid Reflux That Keeps Coming Back: What Is Actually Driving It

The fixes with the best evidence cost nothing

When researchers graded the standard lifestyle advice for reflux, most of the famous trigger-food lists had no published evidence of benefit. What held up was weight loss and raising the head of the bed.² A later review added detail for night-time reflux: late evening meals raised the time acid spent in the esophagus while lying down by 5.2 percentage points, and raising the head of the bed cut it from 21 percent to 15 percent.³

• Raise the head of your bed 6 to 8 inches on blocks or risers, or use a wedge. Extra pillows mostly bend your neck and leave your torso flat.
• Stop eating three hours before you lie down.
• If you carry extra weight, losing some is the change with the strongest evidence of anything on this page.
• For quick relief, alginate products, which form a raft on top of stomach contents, beat placebo or antacids in a meta-analysis of 14 studies,⁴ though a second review found no clear difference against prescription acid blockers.⁵

Five things worth checking when it keeps coming back

1. H. pylori

H. pylori is a stomach bacterium that often causes no symptoms at all. It is the main cause of chronic gastritis, a major cause of ulcers, and a risk factor for some stomach cancers.⁶ About one in five peptic ulcers is tied to it, and H. pylori plus regular NSAID use raises the risk of a bleeding ulcer more than sixfold.⁷ Ask for a breath test or a stool antigen test, which detect active infection. A blood antibody test cannot tell an old infection from a current one. This is the one place where I think the prescription route deserves first consideration, because clearing the infection has real outcome evidence behind it.

2. Your diaphragm and how you sit

The valve at the bottom of your esophagus is only half of the barrier. The diaphragm wraps around it and works as a second, outer valve, tightening with every breath, and a hiatal hernia pulls the valve out of the diaphragm's grip.⁸⁹ Slumping after meals squeezes the stomach and pushes up against the valve. Sitting tall after eating and slow belly breathing give the diaphragm its job back.

3. Bloating and bacterial overgrowth

Gas and bloating raise the pressure inside your abdomen, which pushes against the same valve. A 2025 case-control study found an association between reflux and small intestinal bacterial overgrowth.¹⁰ If bloating travels with your reflux, it is worth raising.

4. Stomach acid, honestly

You will read everywhere that reflux is really caused by low stomach acid. Low stomach acid is real and testable, and the strongest published case for replacing acid is in autoimmune gastritis, where the acid-making cells are destroyed.¹¹ That is not evidence that most people with reflux have low acid, and that broader claim does not have trial support. Test before you treat. Adding acid with betaine HCl to an ulcer, erosive esophagitis or gastritis can hurt you, and those cause exactly the symptoms that send people looking for it.

5. Years on an acid blocker

PPIs work, and for erosive disease they matter. Long-term use is linked to lower B12, magnesium and calcium,⁷ so those are worth checking if you have been on one for years. If you want to come off, plan it with your prescriber. The American Gastroenterological Association has published guidance on stopping PPIs, including that some people need to stay on them, such as those with Barrett's esophagus or severe erosive disease, and that a temporary flare of symptoms can follow stopping.¹²

When to see a doctor, not a guide

Book an appointment rather than self-treating if you have any of these:

• Difficulty swallowing, or food that feels like it catches
• Unintentional weight loss or persistent vomiting
• Anemia or a known low iron level
• Symptoms that started after age 60
• A family history of esophageal or stomach cancer

Guidelines send people aged 60 and over with these kinds of symptoms for an upper endoscopy.¹³ Most people with reflux never develop complications, but years of untreated heartburn are not a neutral choice either.

Common questions