For decades, stomach ulcers were blamed on stress and spicy food. Then came a discovery that changed the picture entirely: a spiral-shaped bacterium called Helicobacter pylori, or H. pylori, that can live in the stomach lining and cause a great deal of trouble. It is one of the most common bacterial infections worldwide, and understanding it explains a lot of persistent indigestion.
What H. pylori does
H. pylori is well adapted to survive the harsh acid of the stomach. In many people it causes no problems at all. But in others it inflames the stomach lining (gastritis) and weakens the protective barrier, allowing acid to damage the tissue underneath. This can lead to:
- Peptic ulcers — sores in the lining of the stomach or the first part of the small intestine.
- Chronic indigestion — a gnawing or burning discomfort in the upper tummy, often worse when hungry.
- Bloating, nausea and reduced appetite — vaguer symptoms that overlap with many gut conditions.
Long-term infection is also linked to a small increased risk of certain stomach cancers, which is one reason finding and treating it matters.
How the blood test works
A blood test looks for IgG antibodies to H. pylori — evidence that your immune system has encountered the bacterium. It is a simple, convenient way to check whether infection is likely, particularly as a first step when someone has ongoing indigestion. It is worth knowing that antibodies can persist for a while after successful treatment, so blood testing is generally used to detect infection rather than to confirm that it has cleared. Breath or stool tests are often used to check for cure after treatment.
How it is treated
The good news is that H. pylori is treatable. Standard treatment, prescribed by a doctor, combines a course of antibiotics with a medication that reduces stomach acid, usually taken together for a week or so. This clears the infection in most people and allows ulcers to heal. Completing the full course exactly as prescribed is important to give the best chance of eradication.
Test for H. pylori
An H. pylori blood test checks for the bacterium behind much indigestion and ulcer disease — a practical starting point when upper-tummy symptoms won't settle.
Book an H. pylori testWhen to see a doctor promptly
Indigestion is common and usually not serious, but certain warning signs need prompt medical attention. See a doctor urgently if you have difficulty swallowing, are vomiting blood or bringing up material that looks like coffee grounds, notice black or tarry stools, have unexplained weight loss, or feel persistently full after small meals. These symptoms can point to bleeding or other conditions that must be assessed without delay.
The bottom line
If you have had nagging indigestion or upper-tummy discomfort for weeks, H. pylori is worth ruling in or out. It is common, easy to test for, and highly treatable — and identifying it can bring lasting relief rather than repeated courses of antacids.
Test for H. pylori
Book online with OneMedicine — CQC-registered clinic in Birmingham, or a home visit / local clinic nationwide. Doctor-reviewed results, most within 24 hours.
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Specialist interest: Cardiovascular Medicine · OneMedicine, CQC-registered clinic