Managing GERD comes down to avoiding the specific foods, habits, and physical factors that either relax the valve between your stomach and esophagus or increase pressure on your stomach. That valve, called the lower esophageal sphincter (LES), is supposed to stay closed after you swallow. When it loosens or opens at the wrong time, stomach acid flows back up and causes the burning, chest pain, and irritation that define reflux. Here’s what reliably makes that worse.
Foods That Loosen the Valve
Several common foods directly relax the LES, making it easier for acid to escape upward. Chocolate and peppermint are two of the most consistent offenders. Both cause the sphincter muscle to relax, which is why an after-dinner mint or a square of dark chocolate can trigger symptoms within minutes. Coffee, tea, cocoa, and cola loosen the valve while also stimulating your stomach to produce more acid, a double hit.
Fatty and greasy foods slow digestion and keep food sitting in the stomach longer, which increases the window for reflux. Spicy foods are a well-known trigger for many people, though tolerance varies. The American College of Gastroenterology specifically flags chocolate, coffee, peppermint, greasy and spicy foods, tomato products, and alcohol as foods to avoid.
Foods That Irritate Directly
Some foods don’t relax the valve but instead irritate the esophageal lining on contact or ramp up acid production. Citrus fruits like lemons, limes, and oranges fall into this category. Tomato-based products are particularly problematic: canned tomatoes, tomato sauce, and ketchup tend to be more triggering than fresh tomatoes. Vinegar and vinegar-based dressings also increase stomach acid.
If your esophagus is already inflamed from chronic reflux, these acidic foods essentially pour acid onto damaged tissue. You may tolerate small amounts on a good day, but during a flare they can make symptoms significantly worse.
Drinks That Fuel Reflux
Alcohol contributes to reflux by relaxing the LES and is one of the biggest lifestyle risk factors for worsening GERD. Beer and wine tend to be more problematic than small amounts of spirits, partly because of the larger volume consumed.
Carbonated beverages present a different problem. The carbon dioxide gas expands your stomach, and that distension can trigger the sphincter to relax momentarily. Research has shown that carbonated drinks can acutely lower the pH inside the esophagus and increase the rate of these transient sphincter relaxations. Even sparkling water can be an issue for some people, though it’s less irritating than sugary sodas.
Caffeinated drinks, including coffee and tea, both relax the LES and stimulate acid secretion. Switching to decaf may help somewhat, but coffee has other compounds beyond caffeine that affect acid production, so it’s not always a complete fix.
Eating Habits That Matter
Large meals are a reliable trigger. When your stomach stretches to accommodate a big plate of food, the contents push upward and the LES loosens. Eating smaller, more frequent meals reduces that pressure significantly.
Meal timing is just as important as meal size. Eating within two to three hours of bedtime triggers acid production right when you’re about to lie flat. The University of Rochester Medical Center recommends waiting at least three hours after eating before going to bed. This gives your stomach time to empty and reduces the volume of acid available to reflux while you sleep.
Sleep Position and Bed Setup
Sleeping on your right side is one of the lesser-known GERD triggers. When you lie on your left side, the esophagus and its sphincter sit higher than the stomach, so acid drains away more quickly. On your right side, the anatomy reverses, and acid pools near the valve. If nighttime reflux is a problem, switching to your left side can make a noticeable difference.
Elevating the head of your bed by 6 to 10 inches also helps by using gravity to keep acid in your stomach. The key detail here: regular pillows don’t work for this. They bend your neck without changing the angle of your torso, so acid can still travel up. A foam wedge that goes under your mattress or under your upper body is what actually changes the angle enough to matter.
Tight Clothing and Abdominal Pressure
Anything that squeezes your midsection pushes stomach contents upward. A study published in Gastroenterology measured the effects of a tight waist belt and found it increased pressure inside the stomach by about 7 mmHg while fasting and 9 mmHg after a meal. The result was dramatic: acid reflux increased roughly eightfold at sensors placed just above the sphincter. The belt also nearly quadrupled the time it took the esophagus to clear refluxed acid, from 23 seconds without the belt to 81 seconds with it.
This applies to tight jeans, belts cinched snugly, shapewear, and high-waisted compression garments. If you notice symptoms worsen after getting dressed in the morning, your clothing may be a factor. Excess abdominal fat creates the same kind of constant inward pressure, which is why weight loss is one of the most effective long-term strategies for reducing reflux.
Medications That Worsen Reflux
Several common medications can make GERD worse, either by relaxing the sphincter or by directly irritating the esophagus. Medications for high blood pressure and heart disease, including calcium channel blockers and nitrates, relax the LES as a side effect. So do certain sedatives, opioid painkillers, tricyclic antidepressants, and medications for overactive bladder.
A separate group of medications irritates the esophageal lining on the way down. Certain antibiotics, bone-density medications (bisphosphonates), iron supplements, and potassium supplements can all cause heartburn-like pain that mimics or compounds GERD symptoms. If you take any of these and your reflux has worsened, it’s worth discussing alternatives or adjusted timing with whoever prescribed them. Taking these medications with a full glass of water and remaining upright for 30 minutes afterward can reduce esophageal irritation.
Smoking and Tobacco
Smoking has long been linked to decreased LES tone and increased reflux symptoms, and the American College of Gastroenterology lists tobacco as both a reflux trigger and one of the biggest risk factors for esophageal cancer. The mechanism may involve more than just nicotine. Smoking reduces saliva production, and saliva is your esophagus’s natural way of neutralizing and washing away acid. Smoking also appears to increase acid secretion in the stomach. Quitting is one of the highest-impact changes you can make for GERD.
Exercise and Body Position
Activities that increase abdominal pressure or put you in a bent-over position can provoke reflux. Crunches, heavy deadlifts, and exercises that involve straining with a tight core are common culprits. Running can also trigger symptoms because of the repetitive jarring motion. Lower-impact options like walking, cycling, or swimming tend to be better tolerated. If you exercise after eating, the combination of a full stomach and physical movement makes reflux far more likely. Waiting at least two hours after a meal before vigorous activity helps.