An acidic stomach usually means too much hydrochloric acid is irritating your stomach lining or pushing up into your esophagus, causing heartburn, nausea, or a sour taste. The fix depends on whether you’re dealing with an occasional flare-up or a recurring pattern. Most people can get significant relief through a combination of dietary changes, better meal timing, and the right over-the-counter medication when needed.
What Makes Your Stomach Overproduce Acid
Your stomach lining contains specialized cells that pump out hydrochloric acid in response to three main signals: nerve impulses triggered when you see, smell, or taste food; a hormone called gastrin released when food enters your stomach; and histamine, which acts as a local chemical messenger that amplifies the acid response. Histamine is likely the strongest driver of the three, but the total amount of acid you produce comes from all these signals working together.
This system works fine under normal conditions. Problems start when certain foods, stress, or habits push acid production higher than your body can buffer, or when the valve between your stomach and esophagus (called the lower esophageal sphincter) relaxes at the wrong time and lets acid escape upward. About 825 million people worldwide deal with chronic acid reflux, so this is far from rare.
Foods That Make It Worse
Certain foods relax that valve between your stomach and esophagus while also slowing digestion, which means food sits in your stomach longer and produces more acid. According to Johns Hopkins Medicine, the worst offenders are foods high in fat, salt, or spice:
- Fried and fast food, including pizza and processed snacks like potato chips
- Fatty meats such as bacon and sausage
- Spicy seasonings like chili powder, cayenne, and black pepper
- Cheese, especially full-fat varieties
- Tomato-based sauces and citrus fruits, which add acidity on top of what your stomach already produces
- Chocolate, peppermint, and carbonated drinks, all of which can loosen the esophageal valve
You don’t necessarily need to eliminate all of these permanently. Start by cutting the ones you eat most often and see if your symptoms improve over one to two weeks. Many people find that removing just two or three major triggers makes a noticeable difference.
Meal Timing and Portion Size
When you eat matters almost as much as what you eat. Lying down with a full stomach is one of the most reliable ways to trigger acid reflux, because gravity can no longer help keep acid where it belongs. Stop eating at least three hours before bedtime. This gives your stomach enough time to empty most of its contents before you go horizontal.
Large meals also stretch the stomach and put pressure on the esophageal valve. Eating smaller, more frequent meals throughout the day keeps acid production steadier and reduces the chance of overflow. If you tend to eat two big meals a day, splitting them into three or four smaller ones can help considerably.
How You Sleep Changes Everything
Sleeping on your left side reduces acid exposure in the esophagus. The reason is straightforward: in that position, your stomach sits below your esophagus, so gravity works in your favor and acid is less likely to travel upward. Sleeping on your right side or flat on your back does the opposite.
Elevating the head of your bed also helps. You can use a wedge pillow or place blocks under the legs at the head of your bed. Stacking regular pillows is less effective because it tends to bend you at the waist rather than creating a gradual incline, which can actually increase abdominal pressure.
Quick Relief With Baking Soda
Baking soda (sodium bicarbonate) is a simple kitchen remedy that neutralizes stomach acid on contact. For adults, the standard dose is half a teaspoon dissolved in a full glass of cold water, taken after meals. You can repeat this every two hours if needed, but don’t exceed five teaspoons in a single day.
This is strictly a short-term fix. The Mayo Clinic advises against using baking soda as an antacid for more than two weeks. If your symptoms keep returning, that’s a sign something else is going on and you need a different approach. Baking soda is also high in sodium, so it’s not a great option if you’re watching your salt intake or have high blood pressure.
Over-the-Counter Medications
Three categories of acid-reducing medications are available without a prescription, and they work differently.
Antacids (like calcium carbonate or magnesium hydroxide) neutralize acid that’s already in your stomach. They work within minutes but wear off relatively quickly. These are best for occasional, predictable symptoms, like heartburn after a specific meal.
H2 blockers (like famotidine) reduce acid production by blocking one of the chemical signals that tells your stomach to make more acid. They take 30 to 60 minutes to kick in and provide relief for about eight hours. They’re a good middle-ground option if antacids aren’t cutting it.
Proton pump inhibitors, or PPIs (like omeprazole), are the strongest option. They shut down the acid pumps in your stomach lining more completely, reducing acid output for 15 to 21 hours a day. The trade-off is that they can take up to four days to reach full effect, so they’re not useful for immediate relief. PPIs work best when taken consistently for a stretch, not as needed.
Are PPIs Safe Long-Term?
A large 2025 study across five Nordic countries found that long-term PPI use does not appear to increase the risk of stomach cancer, which had been a lingering concern. That said, extended use has been linked to other issues, including a higher risk of certain gut infections, weakened bones, and poor absorption of some vitamins and minerals. The general recommendation is to use PPIs at the lowest effective dose and periodically reassess whether you still need them.
Natural Approaches That Help
Chamomile tea has anti-inflammatory properties that may ease acid reflux symptoms, particularly when you drink it after meals or before bed. It’s not a powerful acid suppressant on its own, but it can soothe an irritated stomach lining and help you wind down in a way that also reduces stress-related acid production.
Ginger is another option with a long track record for settling the stomach. Fresh ginger steeped in hot water for five to ten minutes makes a simple tea that many people find effective for mild nausea and acid discomfort. Start with a small piece (about an inch of fresh root) and see how your body responds, since too much ginger can actually irritate the stomach.
Other habits that reduce acid symptoms over time include maintaining a healthy weight (excess abdominal fat puts direct pressure on the stomach), wearing loose-fitting clothing around the waist, quitting smoking (nicotine relaxes the esophageal valve), and managing stress through regular movement or relaxation techniques. None of these are instant fixes, but they address the underlying causes rather than just masking symptoms.
Signs That Need Medical Attention
Most stomach acidity responds well to the strategies above. But some symptoms signal something more serious. According to the National Institute of Diabetes and Digestive and Kidney Diseases, you should see a doctor if you experience difficulty swallowing or pain when swallowing, unexplained weight loss, loss of appetite, persistent vomiting, chest pain, or any signs of digestive bleeding. Bleeding can show up as vomit that looks like coffee grounds or stool that appears black and tarry. These symptoms don’t always mean something dangerous is happening, but they warrant investigation.