Gastritis: Symptoms, Causes, Diagnosis, and Treatment

Pain or burning in the upper abdomen is often described simply as “gastritis.” However, these symptoms can also be caused by acid reflux, peptic ulcers, functional dyspepsia, gallbladder problems, or other digestive conditions.

Gastritis is inflammation of the stomach lining. It may develop suddenly or progress slowly over months or years. Some people experience significant discomfort, while others have no symptoms.

Identifying the cause is essential because an infection caused by Helicobacter pylori requires a different treatment from damage caused by anti-inflammatory medications or autoimmune gastritis.

The inside of the stomach is protected by a layer called the gastric mucosa. Gastritis occurs when this lining becomes inflamed.

There is also a condition called gastropathy, in which the stomach lining is damaged with little or no inflammation. Although the two conditions can cause similar symptoms, they are not the same.

Gastritis may be classified as:

• Acute: It begins suddenly and may last a short time.
• Chronic: It develops gradually and can persist for years.
• Erosive: It causes small breaks or erosions in the stomach lining.
• Nonerosive: Inflammation is present without visible erosions.
• Atrophic: It causes the gradual loss of stomach glands and may require long-term monitoring.

Many people with gastritis have no symptoms. When symptoms occur, they are often similar to indigestion or dyspepsia.

Common symptoms include:

• Pain, burning, or discomfort in the upper abdomen.
• Nausea.
• Vomiting.
• Feeling full soon after beginning a meal.
• Uncomfortable fullness after eating.
• Loss of appetite.
• Abdominal bloating.
• Belching.
• Unintentional weight loss in some cases.

These symptoms do not confirm gastritis on their own. Gastroesophageal reflux, ulcers, functional dyspepsia, and other conditions can cause similar problems.

No. They are different conditions:

• Gastritis: Inflammation of the stomach lining.
• Gastroesophageal reflux: Movement of stomach contents into the esophagus, often causing chest burning or regurgitation.
• Peptic ulcer: A deeper sore in the stomach or duodenum.
• Dyspepsia: A group of symptoms that can include upper abdominal pain, burning, fullness, and early satiety, sometimes without a visible injury.

A person may have more than one of these conditions at the same time. The location of the discomfort is not always enough to tell them apart, so persistent symptoms require medical evaluation.

H. pylori is a bacterium that can live in the stomach and is one of the leading causes of chronic gastritis.

Without treatment, the infection may contribute to ulcers and, in certain patients, atrophic or precancerous changes. Most people with the bacterium will not develop stomach cancer, but successful eradication reduces certain risks and prevents some complications.

Medications such as ibuprofen, naproxen, and aspirin can weaken the stomach’s protective mechanisms. They may cause gastropathy, erosions, ulcers, or bleeding.

Risk increases with:

• High doses.
• Prolonged use.
• Older age.
• A history of ulcers.
• Simultaneous use of blood thinners or corticosteroids.
• Alcohol consumption.

Do not stop aspirin or anticoagulants prescribed for a cardiovascular condition without speaking with your physician.

Heavy alcohol consumption can irritate and damage the stomach lining. The effect depends on the amount, frequency, and individual susceptibility.

Autoimmune gastritis occurs when the immune system attacks cells in the stomach. It can interfere with iron and vitamin B12 absorption, resulting in anemia.

This form of gastritis may require laboratory testing, endoscopy, and long-term monitoring.

Major surgery, extensive burns, trauma, sepsis, and critical illness can cause acute injury to the stomach lining.

Everyday emotional stress may make digestive symptoms feel worse, but it should not automatically be considered the cause of gastritis.

Less common causes include:

• Bile reflux into the stomach.
• Radiation therapy or certain cancer treatments.
• Infections in immunocompromised patients.
• Eosinophilic gastritis.
• Crohn’s disease.
• Other uncommon inflammatory conditions.

Diet is not the primary cause of gastritis in most cases. Spicy foods, coffee, carbonated beverages, fatty meals, and citrus products may worsen symptoms in some people, but they do not affect everyone in the same way.

There is no single “gastritis diet” that works for everyone. General recommendations include:

• Identify foods and beverages that consistently trigger your symptoms.
• Avoid alcohol while you have symptoms or active stomach injury.
• Do not smoke.
• Eat moderate portions.
• Avoid lying down immediately after meals if you also have reflux.
• Maintain a varied and nutritionally adequate diet.

Eliminating gluten or dairy products is not a general treatment for gastritis. These restrictions are appropriate when celiac disease, an allergy, an intolerance, or another medical indication has been confirmed.

Unnecessary restrictive diets can cause nutritional deficiencies and make it more difficult to identify the actual cause of symptoms.

A gastroenterologist will begin by reviewing your symptoms, medications, alcohol consumption, and personal or family history of ulcers, anemia, or stomach cancer.

Depending on your circumstances, the evaluation may include the following tests.

An active infection can be detected through:

• A urea breath test.
• An H. pylori stool antigen test.
• A biopsy obtained during an upper endoscopy.

Proton pump inhibitors, antibiotics, and medications containing bismuth can affect some test results. Do not stop these medications on your own. Your physician will tell you how to prepare.

Blood tests may be used to look for:

• Anemia.
• Iron deficiency.
• Vitamin B12 deficiency.
• Signs of inflammation or other conditions.

During an upper endoscopy, the specialist passes a thin camera through the mouth to examine the esophagus, stomach, and duodenum.

Biopsies may also be collected to:

• Confirm inflammation.
• Detect H. pylori.
• Identify atrophy or intestinal metaplasia.
• Look for ulcers and other injuries.
• Investigate precancerous changes or cancer.

Not everyone with digestive discomfort needs an endoscopy. Age, warning signs, family history, anti-inflammatory medication use, and individual risk help determine when it is necessary.

Treatment depends on the underlying cause. An antacid may provide temporary relief, but it does not necessarily address the condition damaging the stomach.

When the infection is confirmed, treatment uses a combination of antibiotics and medication that reduces stomach acid. The regimen is selected according to bacterial resistance, allergies, and antibiotics previously used by the patient.

Do not select antibiotics yourself or repeat an old prescription. Resistance to certain medications can cause treatment failure.

After treatment, eradication should be confirmed with a breath test, stool antigen test, or a biopsy when clinically appropriate.

Testing for cure is performed at least four weeks after completing antibiotics. To reduce the risk of a false-negative result, proton pump inhibitors are generally stopped for two weeks under medical supervision.

The specialist may prescribe:

• Proton pump inhibitors.
• H2-receptor blockers.
• Antacids for temporary relief.
• Medications that protect the stomach lining in selected cases.

The medication, dosage, and treatment duration depend on the diagnosis. Long-term treatment should be reviewed periodically.

The physician may recommend:

• Stopping or reducing the medication responsible.
• Switching to another treatment.
• Adding stomach protection.
• Testing for H. pylori.
• Evaluating the risk of gastrointestinal bleeding.

Do not discontinue a prescribed medication without consulting the professional responsible for your treatment.

Treatment may include vitamin B12, iron, or folic acid replacement. Some patients require endoscopic monitoring based on the severity of atrophy and their individual risk factors.

Recovery time depends on the cause and severity.

Acute irritation may improve within a few days once the trigger is removed and appropriate treatment begins. H. pylori infection, autoimmune gastritis, and atrophic gastritis require longer-term treatment and monitoring.

Persistent symptoms do not always mean that a stronger acid-reducing medication is needed. The diagnosis may need to be reviewed, H. pylori eradication confirmed, or another condition investigated.

Depending on its cause, persistent gastritis may lead to:

• Erosions.
• Peptic ulcers.
• Gastrointestinal bleeding.
• Iron-deficiency anemia.
• Vitamin B12 deficiency.
• Atrophic gastritis.
• Intestinal metaplasia.
• An increased risk of certain stomach cancers.
• Gastric mucosa-associated lymphoid tissue lymphoma.

These complications do not occur in every patient. Risk is higher with certain forms of chronic gastritis, particularly those associated with persistent H. pylori, atrophy, or autoimmune disease.

Schedule an evaluation if you experience:

• Recurrent pain or burning in the upper abdomen.
• Symptoms that persist or keep returning.
• Frequent early fullness.
• Recurrent nausea or vomiting.
• Regular use of anti-inflammatory medications.
• A history of peptic ulcers.
• Anemia without a clear cause.
• A family history of stomach cancer.
• Symptoms that do not improve with initial treatment.

A specialist can distinguish gastritis from other causes of digestive discomfort and select the tests that are actually necessary.

Go to the Emergency Department immediately if you have:

• Vomiting of blood.
• Dark vomit that resembles coffee grounds.
• Black, sticky, or bloody stools.
• Sudden or severe abdominal pain.
• Fainting, confusion, or marked weakness.
• Pale skin accompanied by rapid breathing or palpitations.
• Persistent vomiting that prevents you from drinking fluids.
• A rigid abdomen.
• Chest pain.

These signs may indicate gastrointestinal bleeding, perforation, or another emergency. Do not wait for a scheduled appointment.

At BlueNetHospitals Los Cabos, our Gastroenterology specialists can evaluate the cause of your symptoms, request testing for H. pylori, and determine whether you need an endoscopy or another diagnostic study.

An accurate diagnosis helps avoid unnecessary treatments and allows the underlying cause—not only the burning sensation—to be addressed.

If stomach pain, burning, nausea, or indigestion persists or keeps returning, schedule an evaluation with our specialists.

📲 Appointments via WhatsApp: +52 (624) 151 0693

If you have bloody vomit, black stools, fainting, or severe abdominal pain:

📞 24-hour Emergency Care: +52 (624) 1043 911

Gastritis is inflammation of the stomach lining. It may be acute, chronic, erosive, nonerosive, atrophic, or autoimmune.

Gastritis may cause upper abdominal pain or burning, nausea, vomiting, loss of appetite, early fullness, and discomfort after eating. Some people have no symptoms.

Symptoms alone cannot confirm it. Diagnosis may require testing for H. pylori, blood tests, or an upper endoscopy with biopsies.

Severe illness may cause physiological stress injury. Emotional stress can worsen digestive symptoms, but other causes should be investigated before assuming it is responsible.

Avoid foods and beverages that consistently trigger your symptoms. There is no universal list, and gluten or dairy products should not be eliminated without a medical reason.

Many forms resolve when the underlying cause is treated. Autoimmune and atrophic gastritis may require long-term medical monitoring.

Treatment combines antibiotics with acid-reducing medication. A follow-up test is necessary to confirm that the infection has been eradicated.

Most cases do not develop into cancer. Certain forms involving atrophy, intestinal metaplasia, autoimmune disease, or persistent H. pylori infection can increase the risk and may require monitoring.

It may be recommended when there are warning signs, anemia, unintentional weight loss, persistent vomiting, difficulty swallowing, a relevant family history, or symptoms that do not respond to treatment.

A gastroenterologist evaluates and treats gastritis and determines whether H. pylori testing, an endoscopy, or another treatment is necessary.