Also known as: Gastritis (Acute and Chronic)
Gastritis is inflammation of the stomach lining.
Gastritis refers to inflammation, irritation, or erosion of the protective lining of the stomach (gastric mucosa). It can occur suddenly as acute gastritis, often triggered by alcohol, NSAIDs, or acute stress, or develop gradually as chronic gastritis over months to years. Chronic gastritis is most commonly caused by Helicobacter pylori (H. pylori) bacterial infection, which affects roughly half the world's population, though not everyone with the infection develops symptomatic gastritis.
The stomach lining produces acid and enzymes essential for digestion, protected by a mucus barrier that prevents the acid from damaging the stomach wall itself. When this protective barrier is compromised, whether by bacterial infection, medications, autoimmune attack, or other factors, the stomach acid comes into direct contact with the lining, causing inflammation and damage. The severity can range from mild superficial irritation to deep erosions that may bleed.
Gastritis can be classified by its cause, extent, and microscopic appearance. Erosive gastritis involves visible breaks in the mucosal surface, while non-erosive gastritis shows inflammatory changes without erosion. Autoimmune gastritis, in which the body's immune system attacks parietal cells in the stomach, can lead to vitamin B12 deficiency and pernicious anemia. Early recognition and treatment of gastritis are important to prevent progression to peptic ulcers, gastric atrophy, or in rare cases, stomach cancer.
People with Gastritis often experience the following symptoms.
A gnawing, burning, or aching pain in the upper central abdomen (epigastrium) is the most common symptom. The pain may worsen on an empty stomach or improve temporarily after eating, depending on the cause and type of gastritis.
Stomach lining inflammation triggers nausea, which may be persistent or intermittent. Vomiting may occur in acute gastritis episodes. In severe erosive gastritis, vomit may contain blood or appear like coffee grounds.
Inflammation impairs normal stomach motility and distension, causing a sensation of uncomfortable fullness, bloating, or feeling full after eating only small amounts of food.
Persistent stomach discomfort, nausea, and early satiety often lead to reduced appetite. Over time, this can contribute to unintended weight loss and nutritional deficiencies if left unaddressed.
A general sense of stomach upset, including belching, discomfort after meals, and a feeling of heaviness. Dyspepsia is a broad term that encompasses many of the individual symptoms of gastritis.
When erosive gastritis causes bleeding from the stomach lining, blood is digested as it passes through the intestines, producing black, tarry stools known as melena. This is a warning sign requiring prompt medical attention.
Irritation of the stomach lining and diaphragm can cause frequent hiccups or excessive belching. While mild, these symptoms can be persistent and uncomfortable in chronic gastritis.
Certain factors may increase your likelihood of developing Gastritis.
Common approaches to managing gastritis. Always consult a healthcare provider for personalized treatment.
If H. pylori infection is confirmed, a combination regimen of two antibiotics (typically clarithromycin and amoxicillin or metronidazole) plus a proton pump inhibitor is prescribed for 10-14 days. Successful eradication resolves the underlying cause and allows the stomach lining to heal.
PPIs such as omeprazole, lansoprazole, and pantoprazole reduce stomach acid production, allowing the inflamed gastric mucosa to heal. They are the mainstay of gastritis treatment and are typically prescribed for 4-8 weeks.
Famotidine and similar medications reduce acid production through a different mechanism than PPIs. They may be used as an alternative or adjunct therapy, particularly for milder cases or maintenance therapy after initial healing.
Over-the-counter antacids provide quick symptom relief by neutralizing existing stomach acid. Sucralfate creates a protective coating over damaged mucosa, promoting healing of erosions while shielding them from further acid exposure.
If NSAIDs or other medications are causing gastritis, stopping or switching to alternatives is essential. When NSAIDs cannot be discontinued, co-prescription of a PPI for gastroprotection is recommended to prevent ongoing damage.
Avoiding alcohol, spicy foods, acidic foods, and caffeine reduces irritation of the stomach lining. Eating smaller, more frequent meals and managing stress through relaxation techniques support the healing process alongside medical therapy.
Gastritis is diagnosed through a combination of clinical evaluation, laboratory tests, and endoscopic examination. Upper gastrointestinal endoscopy (gastroscopy) is the gold standard, allowing direct visualization of the stomach lining and collection of biopsy samples to determine the type and severity of inflammation. Biopsies are tested for H. pylori through rapid urease testing and histological examination. Non-invasive H. pylori testing options include the urea breath test, stool antigen test, and blood antibody testing. Blood tests may reveal anemia from chronic bleeding or vitamin B12 deficiency in autoimmune gastritis. A complete blood count, liver function tests, and inflammatory markers help assess overall health and rule out other conditions. Imaging studies such as barium swallow or CT scan are occasionally used when complications like perforation are suspected.
Steps that may help reduce the risk of developing or worsening gastritis.
Limit or avoid regular use of NSAIDs such as ibuprofen and aspirin; use acetaminophen as an alternative for pain relief when appropriate.
Moderate alcohol consumption or abstain entirely, as alcohol directly irritates and erodes the gastric mucosa.
Practice good hand hygiene and food safety to reduce the risk of H. pylori infection, which is transmitted through contaminated food, water, or close contact.
Manage stress through regular exercise, adequate sleep, and relaxation techniques, as chronic stress increases stomach acid production and impairs mucosal defenses.
Avoid smoking, as tobacco impairs blood flow to the stomach lining and reduces its ability to repair itself.
If left untreated or poorly managed, gastritis may lead to:
Acute gastritis can resolve within a few days to weeks once the triggering factor is removed and appropriate treatment is started. Chronic gastritis, particularly when caused by H. pylori, may take several weeks to months to heal fully with proper antibiotic and acid-suppressive therapy. Following treatment, patients should adhere to dietary recommendations and attend follow-up testing to confirm healing.
Chronic gastritis, especially when caused by long-standing H. pylori infection, can lead to atrophic gastritis and intestinal metaplasia, which are considered precancerous changes. While the overall risk is relatively low, it is higher than in the general population. Early detection and eradication of H. pylori infection significantly reduces this risk. Autoimmune gastritis also carries a small increased risk of gastric neuroendocrine tumors.
Gastritis is diffuse inflammation of the stomach lining that may be superficial or involve erosions. A peptic ulcer is a deeper, localized break in the mucosal lining that extends into the underlying tissue layers. Gastritis can progress to ulcers if left untreated. Both conditions share similar causes (H. pylori, NSAIDs) and treatments, but ulcers carry a higher risk of complications such as perforation and significant bleeding.
Gastritis itself is not contagious, but the most common cause of chronic gastritis, H. pylori infection, can be transmitted from person to person through oral-oral or fecal-oral routes. It is more commonly acquired in childhood in areas with crowded living conditions or limited sanitation. Testing and treating close family members may be recommended when one member is diagnosed with H. pylori infection.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.