Gastritis heals by removing whatever is damaging your stomach lining and then giving that lining time and support to repair itself. Acute gastritis can resolve in days once the irritant is gone, while chronic gastritis may take weeks to months depending on the cause and severity. The approach combines identifying your specific trigger, reducing stomach acid so tissue can regenerate, and adjusting what you eat during recovery.
Find and Remove the Cause
The single most important step is figuring out what’s inflaming your stomach in the first place. The three most common culprits are painkillers (NSAIDs like ibuprofen, aspirin, and naproxen), alcohol, and a bacterial infection called H. pylori. Each one damages the stomach lining through a different mechanism, and the treatment path depends on which one you’re dealing with.
If NSAIDs are the cause, stopping them is often enough to start the healing process. Acetaminophen (Tylenol) is a common substitute because it doesn’t irritate the stomach the same way. If you rely on NSAIDs for chronic pain, talk with your provider about alternatives rather than just pushing through the discomfort.
Alcohol directly erodes the stomach’s protective mucus barrier. Cutting it out entirely during recovery gives the lining a chance to rebuild. For people whose gastritis is mild and caught early, removing the offending substance plus a short course of acid-reducing medication may be all that’s needed.
Treating H. Pylori Infection
H. pylori is a bacterium that burrows into the stomach lining and triggers chronic inflammation. Left untreated, it can lead to a condition called atrophic gastritis, where the stomach gradually loses the glands that produce acid and digestive enzymes. The American Gastroenterological Association notes that this type of damage, sometimes accompanied by changes in the cell structure of the lining, raises long-term risk enough to warrant periodic monitoring with endoscopy.
Current guidelines from the American College of Gastroenterology (2024) recommend a 14-day course of combination therapy as the standard treatment. The preferred regimen for most people combines an acid-suppressing medication with bismuth and two antibiotics. Newer drug combinations have shown higher success rates, particularly against antibiotic-resistant strains. If the first round doesn’t clear the infection, alternative regimens are available, and your provider may test which antibiotics the bacteria respond to before trying again.
Confirming that the bacteria are actually gone after treatment matters. Incomplete eradication means the inflammation continues and the lining can’t fully heal.
Reducing Acid to Let the Lining Repair
Your stomach produces hydrochloric acid to break down food, but when the protective mucus layer is compromised, that same acid burns the exposed tissue. Acid-reducing medications create a window for the lining to regenerate.
Proton pump inhibitors (PPIs) are the strongest option, and the FDA-recommended course is typically 4 to 8 weeks. They work by shutting down acid production at the source. When it’s time to stop, tapering gradually over about 30 days helps avoid rebound acid production, where the stomach temporarily overproduces acid in response to the medication being removed. Switching to a milder acid blocker (an H2 blocker) during this taper period can smooth the transition.
H2 blockers reduce acid less aggressively than PPIs but are useful for milder cases or as a step-down after PPI therapy. For many people with acute gastritis from a known irritant, a few weeks on one of these medications is enough to resolve symptoms and allow tissue repair.
Medications That Protect the Stomach Lining
Beyond reducing acid, certain medications actively coat and protect damaged tissue. Sucralfate forms a physical barrier over eroded areas, shielding them from acid while also stimulating the stomach to produce more protective mucus and bicarbonate (a natural acid neutralizer). Think of it as a bandage for the inside of your stomach.
Bismuth subsalicylate, the active ingredient in Pepto-Bismol, works similarly. It coats the lining, boosts mucus production, and has mild anti-inflammatory and antimicrobial properties, which is why it’s also included in some H. pylori treatment regimens. These protectants are often used alongside acid reducers rather than as replacements.
What to Eat During Recovery
A bland diet during the healing phase reduces the workload on your stomach and avoids further irritation. The goal is soft, low-fiber, non-spicy foods that are easy to digest.
- Good choices: cooked or canned vegetables, lean poultry and whitefish (baked or steamed), eggs, tofu, oatmeal, refined breads and pasta, broth-based soups, applesauce, bananas, low-fat dairy, creamy peanut butter, and weak tea.
- Foods to avoid: spicy seasonings (hot peppers, raw garlic), fried or high-fat foods, raw vegetables, citrus and fresh berries, whole grains and seeds, nuts, pickled foods, strong cheeses, caffeinated drinks, and anything high in added sugar.
Gas-producing vegetables like broccoli, cabbage, cauliflower, and corn can also aggravate symptoms, even though they’re otherwise healthy. You can reintroduce these gradually once your symptoms have resolved. This isn’t a permanent diet. It’s a temporary adjustment, typically lasting the same few weeks to months that medical treatment takes.
Supplements That May Help
Zinc L-carnosine has the most interesting evidence among over-the-counter supplements for gastritis. It appears to exert direct protective and anti-inflammatory effects on the stomach lining through antioxidant activity. A report in the American Journal of Case Reports documented two patients with chronic atrophic gastritis who took zinc L-carnosine (about 40 mg twice daily) for at least 12 months and showed meaningful improvement not only in symptoms but in the actual tissue appearance on biopsy. Their markers of gastric function improved as well. These are case reports, not large trials, but the biological rationale is solid.
Deglycyrrhizinated licorice (DGL) is another option with a long history of use. It’s a form of licorice root with the compound that causes blood pressure problems removed. DGL works by inhibiting stomach acid secretion, increasing protective mucus production, stabilizing the cells lining the stomach surface, and promoting prostaglandin synthesis, which are natural compounds that help maintain the mucus barrier. It’s available as chewable tablets and is generally well tolerated.
Neither supplement replaces medical treatment for H. pylori or severe erosive gastritis, but both may support healing alongside standard therapy.
How Long Healing Takes
Acute gastritis from a short-term irritant like a weekend of heavy drinking or a brief course of NSAIDs can heal in days to a couple of weeks once the irritant is removed. Chronic gastritis is a longer process. If H. pylori is the cause, the antibiotic course itself is 14 days, but the stomach lining may need additional weeks or months of acid suppression to fully recover.
Erosive gastritis, where the damage goes deeper than surface inflammation and creates actual erosions in the tissue, generally takes longer than non-erosive forms. The healing depends on restoring blood flow to the damaged mucosa and rebuilding the protective barriers. When gastritis has progressed to atrophy, where glandular tissue has been lost, recovery is slower and may not be complete. Surveillance endoscopy every three years is sometimes recommended for advanced atrophic gastritis to monitor for further changes.
Most people with straightforward gastritis who follow treatment consistently notice symptom relief within the first week or two. Full histological healing, meaning the tissue looks normal under a microscope, takes longer than symptom relief. Finishing the full course of any prescribed medication matters even after you feel better.
Habits That Speed Recovery
Eating smaller, more frequent meals keeps your stomach from producing large surges of acid at once. Avoid eating within two to three hours of lying down, since gravity helps keep acid where it belongs. Smoking slows mucosal healing and increases acid production, so quitting or cutting back during recovery has a direct impact.
Stress doesn’t cause gastritis on its own, but it reduces blood flow to the stomach lining and can worsen symptoms. Physical stress from serious illness, surgery, or burns is a well-known trigger for erosive gastritis in hospital settings, but everyday psychological stress can also delay healing in an already-inflamed stomach. Anything that helps you manage stress, whether that’s exercise, sleep, or simply reducing your commitments for a few weeks, supports the process.