Digestive Health

Gastritis: Understanding Stomach Lining Inflammation and Relief in the UK

7 min readLast reviewed 8 May 2026

Educational information — not medical advice.

This article was prepared by the OnlineDoctor24 editorial team and reviewed for factual accuracy against UK clinical guidance (NHS and NICE). It is not written by a doctor and does not replace personal medical advice. For symptoms specific to you, book an online doctor consultation.

Key points

  • Gastritis is the inflammation of the stomach lining, which can be acute or chronic.
  • Common causes include H. pylori bacteria, regular use of NSAID painkillers, and excessive alcohol consumption.
  • Symptoms often include gnawing stomach pain, nausea, and feeling full after eating very little.
  • Treatment typically involves acid-suppressing medication and addressing the underlying cause.
  • Most cases are manageable, but persistent symptoms require medical investigation.

What is Gastritis?

Gastritis is a common digestive condition characterized by the inflammation, irritation, or erosion of the stomach lining (the gastric mucosa). This lining serves a vital purpose: it produces mucus to protect the stomach from the highly acidic digestive juices required to break down food.

When this protective barrier is weakened or damaged, the acid begins to irritate the stomach wall, leading to inflammation. Gastritis can occur suddenly (acute gastritis) or develop slowly over time (chronic gastritis). In the UK, it is a frequent cause of upper abdominal discomfort and is often linked to lifestyle factors or specific bacterial infections.

Recognising the Symptoms of Gastritis

The symptoms of gastritis can vary significantly between individuals. Some people may have the condition without noticing any symptoms at all, while others experience significant discomfort. Common signs include:

  • Gnawing or burning ache: Usually felt in the upper abdomen (epigastric pain), which may become worse or better with eating.
  • Nausea and vomiting: A persistent feeling of sickness or actually being sick.
  • Early satiety: Feeling unusually full shortly after starting a meal.
  • Bloating and belching: Distension in the upper stomach area.
  • Loss of appetite: A general lack of desire to eat due to discomfort.

It is important to distinguish these symptoms from other digestive issues like GORD or IBS. While gastritis specifically involves the stomach lining, the discomfort is often more focused in the 'pit' of the stomach rather than behind the breastbone.

Common Causes and Risk Factors

Several factors can trigger the inflammation associated with gastritis. Understanding the cause is essential for effective long-term management.

  • H. pylori Infection: Helicobacter pylori is a bacterium that infects the stomach lining. It is one of the most common causes of chronic gastritis and stomach ulcers worldwide.
  • NSAIDs: Regular use of non-steroidal anti-inflammatory drugs, such as ibuprofen or aspirin, can thin the stomach's protective lining.
  • Excessive Alcohol Consumption: Alcohol can irritate and erode the stomach lining, making it more vulnerable to digestive acids.
  • Autoimmune Gastritis: A less common type where the body's immune system attacks the cells that make up the stomach lining.
  • Bile Reflux: Backflow of bile into the stomach from the bile tract.
  • Stress: Severe physical stress from major surgery, injury, or severe infections can lead to acute stress-induced gastritis.

How is Gastritis Diagnosed in the UK?

If you present with symptoms of gastritis, a healthcare professional will typically review your medical history and lifestyle. According to NICE guidelines, the diagnostic process may involve:

  • H. pylori testing: A simple breath test, stool sample, or blood test can determine if the bacteria are present.
  • Review of medications: Assessing whether the patient is taking high doses of NSAIDs.
  • Gastroscopy (Endoscopy): In some cases, a thin, flexible tube with a camera is passed down the throat to look at the stomach lining directly. A small sample (biopsy) may be taken for analysis.

Treatment and Management Strategies

The primary goal of treating gastritis is to reduce the amount of acid in the stomach to allow the lining to heal, while simultaneously treating the underlying cause.

  • Proton Pump Inhibitors (PPIs): Drugs like omeprazole or lansoprazole reduce acid production by blocking the 'pumps' in the stomach cells.
  • H2 Blockers: Medications like famotidine decrease the amount of acid released into the digestive tract.
  • Antacids: Over-the-counter liquids or tablets that neutralise existing stomach acid for quick relief.
  • Antibiotics: If H. pylori is detected, a course of antibiotics—usually combined with a PPI—is prescribed to eradicate the bacteria.
  • Lifestyle adjustments: Avoiding trigger foods (spicy, acidic, or fatty foods), quitting smoking, and reducing alcohol intake are crucial steps.

When to see an online GP

While mild cases of indigestion may pass, you should consult an online GP if your symptoms persist for longer than a week or if you are concerned about your digestive health. A GP can provide a professional assessment, discuss your symptoms in detail, and issue private prescriptions for acid-suppressing medication if appropriate.

Speaking to a GP is particularly important if you are regularly taking painkillers like ibuprofen and notice stomach pain, as your medication may need to be adjusted to protect your stomach lining. An online consultation offers a convenient way to get expert advice without the wait times of a physical clinic.

Red flags — when to seek urgent help

Call 999 or go to A&E if you experience any of the following:

  • Vomiting blood (which may look like coffee grounds)
  • Black, tarry, or foul-smelling stools (melaena)
  • Unexplained weight loss
  • Difficulty swallowing (dysphagia)
  • Severe, persistent abdominal pain
  • Anemia symptoms like extreme fatigue or pale skin

Frequently asked questions

Common questions UK patients ask about gastritis.

How an online doctor can help

This article is for general information only and does not replace personal medical advice from a qualified doctor. Content is reviewed against UK NHS and NICE guidance by the OnlineDoctor24 editorial team and is not authored by a medical doctor. If your symptoms worsen or you are unsure, please book a consultation with a GMC-registered GP.

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