GERD, or gastroesophageal reflux disease, is a chronic digestive condition where stomach acid repeatedly flows back into the esophagus, causing symptoms like heartburn and regurgitation at least once a week. It affects roughly 14% of the global population, with rates climbing to about 21% in the United States. GERD isn’t just occasional heartburn after a big meal. It’s a more severe, long-lasting pattern where that backflow causes persistent symptoms or damages the esophageal lining over time.
How GERD Differs From Normal Acid Reflux
Everyone experiences acid reflux now and then. Your stomach contents briefly push up into your esophagus, you feel a flash of heartburn, and it passes. This is called gastroesophageal reflux, or GER, and it’s completely normal. GERD is what happens when this process becomes frequent and chronic, producing repeated symptoms or leading to complications. The National Institute of Diabetes and Digestive and Kidney Diseases draws the line at severity and persistence: GERD is reflux that keeps coming back and starts causing problems.
What Happens Inside Your Body
At the bottom of your esophagus sits a ring of muscle about 3 to 5 centimeters long that acts as a one-way valve. When you swallow, it opens to let food into your stomach. The rest of the time, it stays tightly closed to keep stomach acid where it belongs. In people with GERD, this valve relaxes at the wrong times or doesn’t maintain enough pressure to hold back the contents of the stomach.
These inappropriate relaxations are actually the most common cause of reflux in both healthy people and those with GERD. The difference is frequency and severity. Anything that increases pressure inside your abdomen, like excess weight or pregnancy, pushes more forcefully against that valve and makes these episodes worse. When acid, digestive enzymes, and bile repeatedly wash up into the esophagus, they irritate and inflame the lining, which is what produces that burning sensation and, over time, potential tissue damage.
Risk Factors
A hiatal hernia is one of the strongest physical risk factors. This occurs when the upper part of the stomach pushes through the diaphragm into the chest cavity, disrupting the natural barrier that helps keep acid in the stomach. Between 49% and 68% of people with GERD have a hiatal hernia, and that number rises to 78% in those with visible esophageal inflammation and 88% in those who develop Barrett’s esophagus.
Genetic research has identified several additional risk factors with strong associations. A larger waist-to-hip ratio roughly triples the odds of developing a hiatal hernia, and higher trunk fat carries a similar level of risk. Smoking and frequent alcohol consumption both increase the odds as well. Heavy physical labor, older age, and male sex are independent risk factors. Pregnancy, osteoporosis, and abnormal spinal curvature may also contribute.
Symptoms Beyond Heartburn
The classic symptoms are heartburn (a burning feeling behind the breastbone) and regurgitation (the sensation of acid or food coming back up into your throat). These are the “typical” symptoms, and most people with GERD experience one or both.
But GERD can also show up in less obvious ways. The American Gastroenterological Association identifies several conditions that reflux can trigger or worsen outside the esophagus: chronic cough, hoarseness or laryngitis, worsening asthma, and erosion of tooth enamel. These “extraesophageal” symptoms can exist with or without heartburn, which sometimes makes GERD harder to recognize. If you have a persistent cough or hoarse voice that doesn’t respond to the usual treatments, undiagnosed reflux may be a contributing factor.
How GERD Is Diagnosed
There is no single definitive test for GERD, which can make diagnosis tricky. About 70% of people with the condition have no visible damage to their esophagus when examined with an endoscope (a camera threaded down the throat). This non-erosive form is the most common presentation.
The best available diagnostic tool is 24-hour impedance-pH monitoring, where a thin probe placed in the esophagus measures acid levels and reflux episodes over a full day. This test can detect abnormal reflux patterns and correlate them with the moments you experience symptoms. Endoscopy is typically reserved for people with warning signs like difficulty swallowing, unexplained weight loss, or symptoms that don’t improve with treatment. Many people are initially diagnosed based on their symptom pattern and their response to acid-reducing medication.
Complications of Untreated GERD
Left unmanaged, chronic acid exposure can damage the esophageal lining. The most concerning complication is Barrett’s esophagus, where the tissue lining the lower esophagus changes to resemble intestinal tissue. People with GERD are roughly 2.4 times more likely to develop Barrett’s esophagus than those without reflux, and the risk jumps significantly with longer segments of tissue change (over six times higher for longer-segment Barrett’s).
Barrett’s esophagus itself can progress to esophageal cancer, though the overall rate is low: between 0.1% and 0.5% per year for most patients. For those with more extensive tissue changes, the progression rate is closer to 1% per year. These numbers are reassuring in absolute terms, but they underscore why managing GERD matters, especially if you’ve had symptoms for many years.
Lifestyle Changes That Help
Guidelines for GERD management start with lifestyle modifications before moving to medication. The most well-studied change is elevating the head of your bed. In one high-quality trial, 69% of people who raised the head of their bed reported a meaningful improvement in symptoms at six weeks, compared to 33% in the control group. Another study found 72% of people in the elevation group improved, versus 55% without it. This works by using gravity to keep stomach contents from traveling up the esophagus while you sleep. Propping up with pillows alone is less effective than raising the entire head of the bed by six to eight inches using blocks or a wedge.
Other evidence-based changes include losing weight if you carry excess weight (particularly around the midsection), quitting smoking, and avoiding eating within two to three hours of lying down. These all reduce the pressure on the valve at the bottom of your esophagus or decrease the amount of acid available to reflux.
Medication Options
Two main classes of medication reduce stomach acid. H2 blockers (like famotidine) reduce acid production moderately and work well for mild symptoms. Proton pump inhibitors, or PPIs, are stronger and are the standard treatment for persistent GERD. Across multiple studies, PPIs consistently outperform H2 blockers. In one large analysis, PPIs healed 81% of cases compared to 75% for H2 blockers. Another study found PPIs healed 96% of ulcers at eight weeks versus 57% for H2 blockers, with 91% of PPI users reporting pain relief compared to 70%.
For most people with GERD, treatment starts with a standard dose of a PPI taken once daily, with the option to increase to twice daily if typical symptoms persist. These medications are effective for the majority of patients, but they work best when combined with the lifestyle changes described above.
When Surgery Is Considered
Surgery becomes an option when medications aren’t controlling symptoms, when someone wants to stop taking daily medication long-term, or when there are structural problems like a large hiatal hernia. The two main procedures are fundoplication and magnetic sphincter augmentation.
In fundoplication, the surgeon wraps the top of the stomach around the lower esophagus to reinforce the valve. This is the more established procedure and takes about 87 minutes. Magnetic sphincter augmentation (the LINX device) is a newer, simpler approach: a ring of small magnetic beads is placed around the valve, strong enough to keep it closed against reflux but weak enough to open when you swallow. This procedure takes about 42 minutes, doesn’t alter your stomach’s anatomy, and is reversible.
Long-term data shows both procedures perform similarly. Quality-of-life scores, medication use, gas-related symptoms, and the likelihood of needing a second operation are comparable between the two. At nearly seven years of follow-up, 97% of fundoplication patients and 94% of LINX patients had not needed reoperation. The LINX device does cause more difficulty swallowing in the first three months, but this difference disappears by one year.