Most peptic ulcers are preventable because the two biggest causes, a bacterial infection and pain medications, are both manageable with the right approach. Roughly 5 to 10 percent of people will develop a peptic ulcer at some point, but the global incidence rate has dropped by nearly half since 1990, largely because we now understand what drives ulcer formation and how to interrupt it.
The Two Main Causes You Need to Address
Peptic ulcers form when the protective lining of your stomach or upper small intestine breaks down, allowing digestive acid to eat into the tissue beneath. In the vast majority of cases, one of two culprits is responsible: infection with a bacterium called H. pylori, or regular use of NSAIDs like ibuprofen, naproxen, and aspirin. Preventing ulcers means tackling one or both of these.
Smoking, alcohol, and high stress can compound the damage, but they rarely cause ulcers on their own. They make a bad situation worse by weakening the stomach’s defenses or ramping up inflammation.
Reducing Your Risk From Pain Medications
NSAIDs are one of the most widely used drug classes in the world, and they directly irritate the stomach lining while also reducing the production of protective mucus. If you take ibuprofen or naproxen occasionally for a headache, your risk is low. The danger climbs when you use these drugs daily or near-daily, especially at higher doses, if you’re over 60, or if you’ve had a stomach ulcer before.
The simplest prevention strategy is to use the lowest effective dose for the shortest time possible. Acetaminophen (Tylenol) doesn’t carry the same stomach risk and works well for many types of pain. If you need an NSAID regularly for a condition like arthritis, talk to your doctor about adding a stomach-protective medication. Proton pump inhibitors (PPIs) like omeprazole reduce the risk of NSAID-related ulcers by about 60 percent for both stomach and upper intestinal ulcers. They’re generally well tolerated and, according to a large Nordic study of over 17,000 cancer cases, long-term use does not appear to raise the risk of stomach cancer. That said, prolonged PPI use has been linked to other concerns like bone thinning and certain nutrient deficiencies, so periodic reassessment with your doctor makes sense.
Taking NSAIDs with food or a full glass of water can reduce irritation, though this alone isn’t sufficient protection for people at higher risk. Coated or enteric-coated versions may cause less direct stomach irritation, but they still affect mucus production systemically.
Preventing H. Pylori Infection
H. pylori is a spiral-shaped bacterium that burrows into the stomach lining and triggers chronic inflammation. It spreads primarily through person-to-person contact, likely via saliva and contaminated food or water. Most people pick it up during childhood, and infection tends to cluster in families.
Because the bacterium passes between household members so readily, health experts recommend screening all family members when one person tests positive, regardless of whether they have symptoms. Catching and treating infection early matters: acquiring H. pylori at a young age leads to more intense stomach inflammation and a higher lifetime risk of ulcers.
Practical hygiene measures that reduce transmission include:
- Handwashing before eating and after using the bathroom
- Not sharing utensils, cups, or plates, particularly when feeding young children
- Brushing teeth regularly, since H. pylori can survive in the mouth
- Drinking clean water and avoiding food prepared in unsanitary conditions
If you’re concerned about infection, two reliable non-invasive tests exist. A stool antigen test has about 94 percent sensitivity, meaning it catches most infections. A urea breath test is slightly less sensitive at around 87 percent but tends to produce fewer false positives. Either test can confirm whether you’re carrying the bacterium, and treatment with a short course of antibiotics clears the infection in most people.
How Smoking and Alcohol Multiply the Damage
Smoking doesn’t just irritate the stomach directly. It triggers a cascade of inflammatory activity in the stomach lining. Animal research shows that cigarette smoke exposure dramatically increases the formation of stomach lesions after alcohol exposure, largely by recruiting immune cells that release damaging compounds into the tissue. The combination of smoking and drinking is considerably worse than either alone.
Alcohol at high concentrations strips away the stomach’s protective mucus layer and damages the cells beneath it. Moderate drinking is less clearly linked to ulcer formation on its own, but if you already have risk factors like NSAID use or H. pylori infection, alcohol accelerates the breakdown of your stomach’s defenses. Quitting smoking and limiting alcohol are two of the most effective lifestyle changes you can make to protect your stomach lining.
The Role of Stress
The old idea that stress “causes” ulcers was largely replaced by the discovery of H. pylori, but stress hasn’t been exonerated entirely. A Danish registry study following thousands of people over nearly three years found that those reporting the highest levels of everyday stress had a 2.2-fold increased risk of developing a peptic ulcer compared to those with the lowest stress levels. This held up even after adjusting for NSAID use, prior ulcer history, and health behaviors like smoking and drinking.
The likely mechanism involves stress hormones that alter blood flow to the stomach lining and shift the immune response in ways that make the tissue more vulnerable. You don’t need to eliminate all stress from your life, but if you’re already at risk due to other factors, chronic high stress appears to meaningfully raise your chances of developing an ulcer.
Dietary Habits That Protect the Stomach
No single food prevents ulcers, but dietary patterns matter. Populations with higher fiber intake consistently show lower rates of peptic ulcers, and soluble fiber in particular appears to reduce the risk of duodenal ulcers. Good sources of soluble fiber include oats, beans, lentils, apples, and carrots. Animal studies confirm that dietary fiber helps protect the stomach lining against damage from both alcohol and NSAIDs.
Probiotics show genuine promise as a complementary strategy, especially for people being treated for H. pylori. Certain probiotic strains help by competing with H. pylori for space on the stomach lining, strengthening the mucus barrier, and reducing inflammation. In clinical studies, specific probiotic blends boosted H. pylori eradication rates to 90 to 100 percent compared to 70 to 87 percent with antibiotics alone, while also cutting the rate of antibiotic-associated diarrhea roughly in half. Probiotics aren’t a standalone treatment, but they can improve outcomes during and after antibiotic therapy.
Who Should Be Most Vigilant
Some people carry a higher baseline risk and benefit most from proactive prevention. You fall into a higher-risk category if you take NSAIDs regularly, have a history of peptic ulcers, are over 60, smoke, drink heavily, or have a family member with H. pylori infection. Having multiple risk factors compounds the danger considerably.
If you take daily aspirin for heart protection, your stomach risk is real but often overlooked. Low-dose aspirin still inhibits the same protective mechanisms in the stomach lining that higher NSAID doses do. For people on long-term aspirin who have additional risk factors, a daily PPI is a common and effective preventive measure. The key is recognizing that ulcer prevention isn’t a single action but a combination of managing medications carefully, addressing infections early, and keeping lifestyle factors like smoking and alcohol in check.