Causes of Gastritis, Common Triggers & Diagnostic Methods
Gastritis is inflammation of the stomach lining. It may develop suddenly and last for a short period or continue for longer depending on the underlying cause. Gastritis is not always related to a specific type of food. Instead, it may result from a bacterial infection, repeated use of certain medications, autoimmune diseases, and other factors. A person may experience upper abdominal pain or burning, nausea, vomiting, or a feeling of fullness, while some people may have no noticeable symptoms. Therefore, understanding the causes of gastritis helps identify the underlying problem and manage it appropriately rather than simply treating the symptoms temporarily.
Medical Disclaimer: This content was medically reviewed by the Smouha Scope team, specializing in gastroenterology and endoscopy.
What Are the Most Common Causes of Gastritis?
The causes of gastritis vary from one person to another, but several factors are clearly associated with the condition. Infection with Helicobacter pylori, or H. pylori, is among the most important causes. Repeated use of certain pain relievers can also weaken the stomach's protective barrier and irritate its lining. Gastritis may also be associated with smoking, alcohol consumption, or severe physical stress in certain cases. Less common causes include autoimmune disorders and some other medical conditions. Therefore, the cause of gastritis cannot be determined based on symptoms alone, and a doctor may need to evaluate the medical history and perform appropriate tests.
Does H. Pylori Cause Gastritis?
Yes. H. pylori, or Helicobacter pylori, is one of the most important causes of chronic gastritis. These bacteria can live in the mucus layer that protects the stomach lining, and their presence may lead to ongoing inflammation in some people. Not everyone with H. pylori develops noticeable symptoms, so symptoms alone cannot determine whether an infection is present. H. pylori may also be associated with stomach and duodenal ulcers. Therefore, a doctor may request an appropriate test to detect the infection when symptoms or risk factors warrant it. If the infection is confirmed, treatment focuses on eliminating the bacteria according to the medication regimen prescribed by the doctor.
Can Pain Relievers Cause Gastritis?
Repeated use of certain pain relievers can irritate the stomach lining and increase the risk of gastritis. Nonsteroidal anti-inflammatory drugs, such as ibuprofen and aspirin, are particularly associated with this problem because they can affect the natural protective mechanisms that help protect the stomach lining. The risk increases with frequent use or high doses, especially in people with other risk factors. Therefore, if stomach pain or digestive symptoms develop after taking pain relievers, it is better to discuss the issue with a doctor rather than continuing to take them randomly. A prescribed medication for a chronic condition should not be stopped without consulting a doctor, as the medication or its use may be adjusted depending on the individual's condition.
Are Stress and Anxiety Among the Causes of Gastritis?
Psychological stress alone does not explain all cases of gastritis, but severe physical stress can be associated with acute gastritis in certain circumstances, particularly during serious illness, injuries, or major surgery. Daily anxiety and stress may increase the perception of some digestive symptoms or worsen existing discomfort, which can make a person directly associate the symptoms with stress. Therefore, it is important to distinguish between factors that can cause actual inflammation of the stomach lining and factors that increase the sensation of symptoms. If stomach pain persists or recurs, it is not advisable to assume that the cause is purely psychological. The condition should be evaluated to rule out other causes, such as H. pylori or the effects of certain medications.
Less Common Causes of Gastritis
In addition to the well-known causes, other factors may lead to gastritis, although they are less common. These include autoimmune gastritis, in which the immune system attacks certain cells responsible for maintaining the stomach lining. This type may be associated with some autoimmune diseases and vitamin B12 deficiency. Gastritis may also be associated with certain inflammatory diseases or other infections, and in some cases, it can result from radiation therapy or certain cancer treatments. Bile reflux may also irritate the stomach in some patients. The doctor determines the relevance of these causes based on symptoms, medical history, and test results. Therefore, experiencing stomach pain does not necessarily mean that one of these less common causes is responsible.
How Is the Cause of Gastritis Diagnosed?
Diagnosing gastritis involves evaluating symptoms and medical history and then selecting appropriate tests based on each person's condition. The doctor may use tests to detect H. pylori and may order other laboratory tests when specific indications are present. In some cases, an upper endoscopy may be necessary, particularly when symptoms persist or there are signs that require direct examination of the stomach lining. Endoscopy allows the doctor to examine the esophagus, stomach, and duodenum and, when appropriate, take a small tissue sample for further evaluation. Not everyone with stomach pain or heartburn needs an endoscopy. The decision depends on age, symptom severity and duration, and existing risk factors.
When Should You Consult a Doctor?
Stomach symptoms may be mild and temporary, but persistent or severe symptoms require medical evaluation rather than relying on self-treatment for an extended period. It is advisable to consult a doctor if upper abdominal pain or burning persists, nausea and vomiting recur, or unexplained weight loss or loss of appetite occurs. The need for medical care becomes more urgent when signs of bleeding appear, such as vomiting blood or passing black stools, or when there is severe and persistent pain, dizziness, or fainting. These symptoms do not necessarily indicate severe gastritis, but they may point to bleeding or another condition that requires prompt evaluation.
Book Your Examination and Reassure Yourself About Your Stomach Health
If you experience recurrent stomach pain, nausea, or persistent heartburn, do not rely on guessing the cause or taking pain relievers and other medications on your own for extended periods. Identifying the causes of gastritis accurately is the first step toward choosing the appropriate approach to the condition. The cause may be simple and treatable once identified, while some cases may require more detailed testing. At Smouha Scope, a specialized team in gastroenterology and diagnostic and therapeutic endoscopy is available, with techniques that help doctors reach a more accurate diagnosis when needed. Book your appointment to receive an appropriate evaluation and determine the next medical step.
Frequently Asked Questions About the Causes of Gastritis
What Is the Most Common Cause of Gastritis?
Among the best-known causes is gastritis resulting from H. pylori infection, in addition to repeated use of certain pain relievers, particularly nonsteroidal anti-inflammatory drugs. The causes vary depending on the individual case, so the cause cannot be determined from symptoms alone.
Does H. Pylori Cause Gastritis?
Yes. Helicobacter pylori can cause chronic inflammation of the stomach lining and may also be associated with stomach and duodenal ulcers. It can be diagnosed through tests selected by the doctor based on the individual's condition.
Can Pain Relievers Cause Gastritis?
Yes. Certain pain relievers, such as ibuprofen and aspirin, can increase the risk of irritation and inflammation of the stomach lining, especially when used frequently or at high doses.
Do Anxiety and Stress Cause Gastritis?
Severe physical stress may cause gastritis under certain circumstances, while stress and anxiety can increase the perception of some digestive symptoms or worsen existing symptoms. Therefore, the underlying cause should be evaluated when the problem persists.
Is Gastritis Dangerous?
Gastritis can usually be treated once its cause is identified and addressed, but some cases may lead to complications such as bleeding or ulcers. Therefore, persistent symptoms or warning signs should not be ignored.
Does Gastritis Require an Endoscopy?
Not everyone with stomach symptoms needs an endoscopy. A doctor may recommend an endoscopy when symptoms are persistent or severe, signs of bleeding are present, or there are factors that require direct examination of the stomach lining.
