Gastritis can cause persistent stomach discomfort, nausea, bloating, indigestion, and other symptoms that can interfere with everyday life. But while treating the symptoms is important, understanding why the stomach lining has become inflamed in the first place is often just as important. Gastritis can have several underlying causes, including H. pylori infection, medications, autoimmune conditions, alcohol, and other irritants. In this guide, we’ll explore the different types and causes of gastritis, common symptoms, appropriate testing, nutrition and lifestyle strategies, and how a functional medicine approach can help identify contributing factors and support long-term digestive health.  Learn more about gastritis in Naperville with Dr. Sharon Borkowski.

What Is Gastritis?

Because these symptoms can also occur with ulcers, gallbladder disease, reflux, pancreatic disorders, or stomach cancer, persistent symptoms should not be self-diagnosed. Proper evaluation is important—especially when symptoms include bleeding, anemia, unexplained weight loss, difficulty swallowing, or recurrent vomiting.

Functional medicine complements appropriate conventional evaluation by asking a critical question: Why has the stomach lining become inflamed, and what is preventing it from healing?

Acute Gastritis vs. Chronic Gastritis

Gastritis can stem from several factors, including H. pylori infection, medications, autoimmune conditions, alcohol, and other irritants, making it important to understand the underlying cause rather than simply manage symptoms. A personalized approach can combine appropriate medical evaluation with targeted nutrition, lifestyle changes, nutrient support, and functional medicine strategies to promote digestive health and support recovery.

Acute Gastritis

Acute gastritis develops suddenly and is generally short-lived. It may be triggered by:

• Heavy alcohol consumption
• Nonsteroidal anti-inflammatory drugs, or NSAIDs
• Certain infections
• Severe physical illness or injury
• Major surgery, burns, sepsis, or critical illness
• Exposure to another substance that irritates the stomach

Acute gastritis often improves once the offending substance or underlying condition is removed or treated. However, acute erosive gastritis can cause ulcers or gastrointestinal bleeding and may require urgent medical treatment.

The term “stress gastritis” is most accurately used for gastric injury associated with severe physical stress, such as critical illness, major burns, or sepsis. Everyday psychological stress can aggravate pain, nausea, reflux, appetite changes, and other digestive symptoms, but it is not necessarily the primary cause of inflammatory gastritis.

Chronic Gastritis

Chronic gastritis is ongoing inflammation of the stomach lining. Over time, it may damage or thin the gastric tissue, interfere with normal stomach function, and impair the absorption of certain nutrients.

Common forms include:

• H. pylori gastritis
• Autoimmune gastritis
• Chronic irritation or reactive gastropathy associated with NSAIDs, alcohol, or bile reflux

Untreated chronic gastritis may increase the risk of ulcers, iron deficiency, vitamin B12 deficiency, and—in certain forms—stomach cancer. This is why identifying the type and cause is more important than simply suppressing symptoms.

Common Causes of Gastritis

This condition can develop from H. pylori infection, prolonged NSAID use, autoimmune conditions, alcohol, smoking, and other factors that affect the stomach lining. Symptoms may range from upper abdominal discomfort and nausea to bloating, indigestion, appetite changes, early fullness, and unintended weight loss.

Helicobacter pylori Infection

Helicobacter pylori, commonly called H. pylori, is a bacterium that can colonize the stomach lining. It is one of the most common causes of chronic gastritis and an important cause of peptic ulcers.

An untreated infection may persist for many years. In some people, it progressively damages the stomach lining and increases the risk of gastric atrophy and stomach cancer. Testing options include a urea breath test, stool antigen test, or biopsy obtained during an upper endoscopy.

When H. pylori is identified, it requires appropriate antimicrobial treatment. Natural products should not be used as a substitute for medically indicated eradication therapy. Current guidelines also emphasize confirming eradication after treatment rather than assuming the infection is gone. American College of Gastroenterology

Long-Term NSAID Use

NSAIDs include medications such as:

• Ibuprofen
• Naproxen
• Aspirin

These medications reduce the production of prostaglandins that help protect the stomach lining. Frequent or prolonged use may weaken the gastric barrier, increasing the risk of erosions, ulcers, and bleeding.

Do not discontinue prescribed aspirin or another medically necessary medication without discussing it with the prescribing clinician. The safest solution may involve changing the medication, reducing the dose, adding protective treatment, or monitoring more closely.

Autoimmune Gastritis

In autoimmune gastritis, the immune system is thought to attack the cells in the stomach lining, including parietal cells. These cells produce stomach acid and intrinsic factor, a protein required for normal vitamin B12 absorption.

As the condition progresses, it can result in:

• Reduced stomach acid
• Poor vitamin B12 absorption
• Iron deficiency
• Gastric atrophy
• Pernicious anemia

Importantly, autoimmune gastritis is not a condition of “too much stomach acid.” Acid levels may actually become abnormally low. This demonstrates why assuming that every burning stomach symptom is caused by excess acid can lead to the wrong approach.

Alcohol, Smoking, and Other Irritants

Alcohol can directly irritate the gastric lining, particularly in larger amounts. Smoking may interfere with tissue repair and increase the risk of ulcers. Other contributors may include bile reflux, certain medications, chemotherapy, radiation, and—in immunocompromised individuals—viral, fungal, or other infections.

Food allergies or sensitivities may contribute to symptoms in selected patients, but they are not among the most common established causes of gastritis. Symptoms following food exposure should be evaluated carefully rather than relying on broad, unvalidated food-sensitivity panels.

Symptoms of Gastritis

Possible symptoms include:

• Burning, aching, or discomfort in the upper abdomen
• Nausea or vomiting
• Bloating
• Indigestion
• Loss of appetite
• Feeling full too early during a meal
• Feeling excessively full afterward
• Unintentional weight loss

Many people with gastritis have no obvious symptoms. Others may have vague symptoms that resemble reflux, an ulcer, or functional dyspepsia.

Chronic gastritis may also contribute to symptoms associated with nutrient deficiencies, including:

• Fatigue
• Weakness
• Brain fog or cognitive changes
• Shortness of breath
• Light-headedness
• Numbness or tingling
• Pale skin
• Exercise intolerance

These symptoms are not specific to gastritis, but they may warrant testing for anemia, iron deficiency, vitamin B12 deficiency, or another condition.

The Functional Medicine and Gastritis Perspective

A functional medicine evaluation looks beyond the diagnostic label and considers why the inflammation began and why it has continued.

Questions may include:

• Is an active H. pylori infection present?
• Is the patient regularly using NSAIDs?
• Could autoimmune gastritis be present?
• Is bile reflux contributing?
• Are acid-blocking medications affecting digestion or test results?
• Are iron or vitamin B12 levels declining?
• Are alcohol, tobacco, or dietary irritants delaying healing?
• Are stress, poor sleep, or irregular eating patterns worsening symptoms?
• Is another digestive disorder being mistaken for gastritis?

This approach should complement—not replace—gastroenterology care, endoscopy, biopsy, or conventional treatment when indicated.

The Gut-Stomach Connection

The stomach is part of a larger digestive ecosystem. Stomach acid helps begin protein digestion, releases nutrients from food, and limits the number of microorganisms entering the intestines.

Changes in acid production, gastric motility, medication use, diet, and microbial balance may influence digestion throughout the gastrointestinal tract. However, symptoms alone cannot establish low stomach acid, dysbiosis, or increased intestinal permeability.

Comprehensive stool testing may offer useful information in selected cases, especially when a patient also has chronic diarrhea, constipation, or other intestinal symptoms. It does not replace validated H. pylori testing or an upper endoscopy when those are medically indicated.

Chronic Gastritis and Nutrient Deficiencies

Chronic inflammation and gastric atrophy may interfere with nutrient absorption. The clearest concerns are iron and vitamin B12.

12. pylori gastritis can impair iron absorption and contribute to iron-deficiency anemia. Autoimmune gastritis can interfere with absorption of both iron and vitamin B12. When intrinsic factor production becomes inadequate, pernicious anemia may develop. National Institute of Diabetes and Digestive and Kidney Diseases

Depending on the patient’s diet, medications, and other health concerns, clinicians may also evaluate folate, vitamin D, zinc, magnesium, or other nutrients. These are not all specific markers of gastritis, but they may influence overall health and recovery.

Gastritis Functional Medicine Testing

A personalized evaluation may include:

• H. pylori stool antigen or urea breath testing
• Upper endoscopy with biopsy when appropriate
• Complete blood count
• Comprehensive metabolic panel
• Iron, ferritin, TIBC, and iron saturation
• Vitamin B12 and folate
• Methylmalonic acid when B12 status is uncertain
• Vitamin D
• Zinc or magnesium when clinically indicated
• Inflammatory markers
• Antibodies associated with autoimmune gastritis
• Comprehensive stool analysis in selected cases
• Organic acids testing when it answers a specific clinical question

A blood antibody test for H. pylori cannot reliably distinguish a current infection from a past infection. Breath and stool antigen testing are generally more useful for identifying active infection, although medications such as proton pump inhibitors can produce false-negative results.

Testing should be selected because it can change clinical decisions—not simply because more testing is available.

Natural Strategies for Supporting Gastritis Recovery

Supporting recovery involves identifying individual food triggers, choosing nourishing and easily tolerated foods, improving eating habits, managing stress, and using supplements or probiotics thoughtfully when appropriate. Persistent or severe symptoms require medical evaluation, and natural strategies should complement—not replace—necessary treatment for underlying causes such as H. pylori, ulcers, or autoimmune conditions.

Use an Individualized, Anti-Inflammatory Diet

There is no single “gastritis diet” that works for everyone. Food does not cause most cases of gastritis, but certain foods may intensify symptoms while the stomach is irritated.

Gentler choices may include:

• Cooked vegetables
• Bananas and other nonacidic fruit
• Lean poultry, fish, or other easily digested proteins
• Soups and broths
• Ginger
• Healthy fats in amounts the patient tolerates

Potential symptom triggers include:

• Alcohol
• Fried or heavily processed foods
• Excess caffeine
• Large, high-fat meals
• Very spicy foods
• Acidic foods during an active flare
• Carbonated beverages

Unnecessarily restrictive diets can create nutrient deficiencies and anxiety around food. The goal is to identify genuine triggers while maintaining the broadest nourishing diet the patient can comfortably tolerate.

Support the Gastric Lining

Depending on the diagnosis, a clinician may consider supportive compounds such as:

• Zinc carnosine
• Deglycyrrhizinated licorice, or DGL
• Slippery elm
• Marshmallow root
• Aloe vera products formulated for internal use
• L-glutamine

Evidence varies among these products, and they should not be represented as cures for H. pylori, autoimmune gastritis, ulcers, or gastrointestinal bleeding.

Licorice-containing products may affect blood pressure and potassium, and some aloe products can cause diarrhea or electrolyte disturbances. Supplements can also interact with medications. Product selection and dosing should therefore be individualized.

Restore Microbial Balance Carefully

Fiber-rich foods, prebiotic foods, fermented foods, and probiotics may support intestinal health, but they are not tolerated equally by everyone. Patients with significant bloating, small intestinal bacterial overgrowth, histamine sensitivity, or active upper-GI symptoms may need a slower and more personalized approach.

Following antibiotic treatment for H. pylori, support may focus on diet diversity, bowel regularity, tolerance-guided fiber, and selected probiotics. Most importantly, the patient should complete a test of cure. The American College of Gastroenterology recommends confirming eradication at least four weeks after treatment, with proton pump inhibitors generally withheld for two weeks beforehand under clinician guidance.

Improve Eating and Lifestyle Habits

Helpful daily practices may include:

• Eating slowly
• Chewing thoroughly
• Choosing smaller meals during symptomatic periods
• Avoiding lying down immediately after eating
• Staying adequately hydrated
• Avoiding tobacco
• Limiting or eliminating alcohol
• Getting consistent sleep
• Using breathing, prayer, meditation, or other relaxation practices
• Addressing chronic stress and anxiety

These strategies may reduce symptom intensity and improve digestive regulation even when stress is not the original cause of the gastritis.

Use Digestive Support Judiciously

Digestive enzymes may help selected patients with meal-related digestive difficulty, but they are not appropriate for everyone.

Betaine hydrochloride or other acid-raising products should not be started simply because low stomach acid is suspected. They may worsen active gastritis or ulcers and can be unsafe in people taking NSAIDs, corticosteroids, or other medications that increase the risk of gastric injury.

When Gastritis Requires Medical Care

Seek urgent medical attention for:

• Vomiting blood
• Vomit resembling coffee grounds
• Black, tarry, maroon, or bloody stools
• Severe or sudden abdominal pain
• Fainting, marked weakness, or shortness of breath
• Persistent vomiting or inability to keep fluids down

Prompt medical evaluation is also important for:

• Unexplained weight loss
• Difficulty or pain with swallowing
• Anemia
• Recurrent vomiting
• Progressive symptoms
• Symptoms that persist for several weeks
• New or persistent upper-abdominal symptoms in an older adult
• A family history or elevated risk of stomach cancer

An upper endoscopy can allow the physician to inspect the stomach lining, obtain biopsies, identify ulcers, test for H. pylori, and evaluate abnormal tissue. NIDDK

Frequently Asked Questions

Can chronic gastritis heal naturally?

Some mild irritation may improve after the trigger is removed, but healing depends on the cause. H. pylori usually requires medical eradication therapy. Autoimmune gastritis requires monitoring and management of its consequences. Lifestyle, nutrition, and selected supplements may support healing, but they should not delay diagnosis or necessary treatment.

Can gut health affect gastritis?

Yes. The stomach and intestines influence one another through acid production, digestive function, immune activity, motility, and the microbiome. However, gut imbalance should not automatically be assumed to be the primary cause of stomach inflammation.

What foods should I avoid?

Alcohol, fried foods, excess caffeine, very spicy foods, and acidic foods frequently worsen symptoms, but tolerance varies. A personalized plan is usually more effective and sustainable than a lengthy universal avoidance list.

Is H. pylori the only cause?

No. Other causes include autoimmune gastritis, NSAID use, alcohol, bile reflux, severe physical illness, and certain medications or infections.

Can functional medicine help?

Functional medicine can help organize a more comprehensive evaluation, identify contributing factors, correct deficiencies, personalize nutrition, and support recovery. It works best when it is integrated with appropriate conventional diagnosis and treatment.

How Naperville Integrated Wellness Helps Patients with Gastritis

At Naperville Integrated Wellness, we look beyond temporary symptom relief to determine what may be driving persistent digestive problems.

Our individualized approach may include:

• A comprehensive health and medication history
• Review of previous laboratory and imaging results
• H. pylori assessment
• Evaluation for anemia and nutrient deficiencies
• Gut microbiome evaluation when appropriate
• Personalized anti-inflammatory nutrition
• Targeted supplementation
• Digestive and stomach-lining support
• Lifestyle and stress-management strategies
• Ongoing monitoring and coordination with medical specialists

Every patient is different. One person may need H. pylori treatment, another may require evaluation for autoimmune gastritis, and another may need to address medication-related irritation or a completely different digestive condition.

Lasting Relief Begins with the Right Diagnosis

If you’re struggling with persistent stomach pain, nausea, bloating, reflux, or other symptoms associated with gastritis, you don’t have to manage them alone. At Naperville Integrated Wellness, we take a personalized approach to understanding what may be contributing to your digestive symptoms and developing a plan to support long-term stomach and gut health. Schedule a consultation today with our naturopath for gastritis to take the next step toward understanding your symptoms, addressing underlying factors, and creating a personalized path toward better digestive health.