The short list of things to avoid with acid reflux includes high-fat foods, citrus, tomatoes, chocolate, coffee, alcohol, mint, and spicy foods. But diet is only part of the picture. How you eat, when you eat, what you wear, and how you move all influence whether stomach acid stays where it belongs or pushes back up into your esophagus.
Most of these triggers share a common mechanism: they either relax the muscular valve between your stomach and esophagus (called the lower esophageal sphincter) or increase pressure inside your stomach. Understanding that pattern helps you identify your personal triggers, even ones not on any standard list.
Foods That Trigger Reflux
The NIDDK identifies seven categories of foods and drinks commonly linked to reflux symptoms: acidic foods like citrus fruits and tomatoes, alcoholic drinks, chocolate, coffee and other caffeine sources, high-fat foods, mint, and spicy foods. These aren’t equally problematic for everyone, but they’re the most consistent offenders across large groups of people.
High-fat foods deserve special attention because they hit you with a double mechanism. Fatty meals reduce pressure in the esophageal sphincter, making it easier for acid to escape upward. They also slow stomach emptying, which means food and acid sit in your stomach longer, increasing the window for reflux to happen. This applies to fried foods, fatty cuts of meat, full-fat dairy, creamy sauces, and rich desserts.
Acidic foods like tomato sauce, orange juice, and grapefruit don’t necessarily cause reflux on their own, but they irritate tissue that’s already inflamed. If your esophagus is already raw from repeated acid exposure, adding more acid from food makes the burning worse.
Why Peppermint Makes Things Worse
Peppermint is widely promoted as a digestive aid, which makes it a sneaky trigger for people with reflux. Peppermint oil relaxes smooth muscle, and that includes the esophageal sphincter. Research from the Medical University of South Carolina confirms that peppermint relaxes the smooth muscle in the lower esophagus. For someone with irritable bowel symptoms, that relaxation can be helpful further down the digestive tract. For someone with reflux, it opens the gate for acid to flow upward. Peppermint tea, peppermint candies, and foods flavored with mint oil all carry this risk.
Drinks That Increase Reflux
Coffee, alcohol, and carbonated beverages are the three drink categories most likely to cause problems.
Coffee stimulates acid production and can relax the esophageal sphincter, and this effect comes from caffeine itself, not just coffee. Tea, energy drinks, and cola carry similar risks. If you’re unwilling to cut caffeine entirely, switching to lower-acid coffee varieties or limiting yourself to one cup earlier in the day may reduce symptoms.
Alcohol reduces esophageal sphincter pressure directly, making reflux more likely with any type of drink. Wine and spirits tend to cause more trouble than beer for many people, but individual responses vary.
Carbonated beverages introduce gas into your stomach, which stretches the stomach wall. That distension triggers temporary relaxations of the esophageal sphincter, increasing the frequency of reflux episodes. Studies have found that carbonated drinks significantly reduce sphincter pressure compared to flat drinks. This includes sparkling water, not just soda.
Eating Habits That Matter as Much as Food
Large meals are one of the most reliable reflux triggers. A full stomach creates more pressure and more opportunities for acid to push upward. Eating smaller, more frequent meals instead of two or three large ones reduces that pressure significantly.
Eating speed matters too. When you eat quickly, you swallow more air and tend to eat more before your body registers fullness. Both increase stomach distension.
The timing of your last meal before bed is critical. Experts recommend waiting at least two to three hours after eating solid foods before lying down. That window gives your digestive system enough time to move food out of the stomach, reducing the likelihood of acid creeping up your esophagus while you sleep. If you drink fluids close to bedtime, aim for at least 30 minutes before lying flat.
Clothing and Body Position
Tight clothing around your midsection is a surprisingly significant trigger. A study published in Gastroenterology found that a snug waist belt increased stomach pressure by about 9 mmHg after a meal and increased acid reflux episodes roughly eightfold. The belt essentially squeezed the stomach and forced acid upward. Tight jeans, shapewear, cinched belts, and high-waisted compression garments all produce similar effects. Switching to looser-fitting clothes around your waist, especially after meals, is one of the simplest changes you can make.
Bending over after eating has a similar effect. Any position that compresses your abdomen or puts your esophagus level with (or below) your stomach makes reflux easier. If you need to pick things up after a meal, bend at the knees rather than the waist.
Exercise Types to Skip
Exercise is good for reflux in the long run, particularly if it helps with weight management. But certain types of exercise make symptoms worse in the moment.
Anything that increases abdominal pressure is a problem: crunches, sit-ups, abdominal presses, and heavy weightlifting all compress the stomach and can force the sphincter open. High-impact activities like running, sprinting, and gymnastics jostle the stomach contents. Exercises that require lying flat, like bench presses, remove gravity’s help in keeping acid down.
Lower-risk alternatives include walking, light cycling (upright, not hunched), swimming, and moderate-intensity strength training that avoids heavy core compression. Timing helps too. Exercising on an empty or mostly empty stomach, at least two hours after eating, reduces the amount of acid available to reflux.
Smoking and Alcohol
Both tobacco and alcohol reduce esophageal sphincter pressure, and the combination is particularly damaging. Nicotine relaxes the sphincter directly, and smoking also reduces saliva production. Saliva is mildly alkaline and helps neutralize any acid that reaches the esophagus, so less saliva means acid lingers longer and does more damage. If quitting entirely isn’t on the table, avoiding smoking within a few hours of meals and bedtime can limit the overlap between reduced sphincter tone and a full stomach.
Medications That Can Worsen Reflux
Several common medications reduce esophageal sphincter pressure as a side effect. Calcium channel blockers (used for blood pressure), nitrates (used for chest pain), and theophylline (used for asthma) are the most well-known culprits. Some pain relievers, particularly anti-inflammatory drugs like ibuprofen and aspirin, can irritate the stomach lining and make reflux symptoms worse even without affecting the sphincter directly.
If you suspect a medication is worsening your reflux, talk to the prescribing doctor about alternatives rather than stopping on your own. In many cases, a different drug in the same class causes fewer digestive side effects.
Sleeping Position
Lying flat equalizes the pressure between your stomach and esophagus, making it easy for acid to flow backward. Elevating the head of your bed by about six inches, using a wedge pillow or placing blocks under the bed frame, keeps gravity working in your favor throughout the night. Stacking regular pillows doesn’t work as well because it bends you at the waist rather than elevating your entire torso, which can actually increase abdominal pressure.
Sleeping on your left side also helps. Your stomach sits slightly to the left, and in this position the esophageal sphincter sits above the level of stomach acid rather than submerged in it. Right-side sleeping has the opposite effect and tends to worsen nighttime symptoms.