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Helicobacter pylori: Symptoms and How It Is Diagnosed

dolor-de-barriga-pylori
03 Nov 2026
33 Min
Diagnostic Tests
Diagnostic Tests

Recurring stomach pain or acid indigestion after meals is often dismissed as simple upset stomach. However, in many cases, these persistent signs point to a widespread bacteria in the digestive tract. Recognizing the symptoms of Helicobacter pylori and understanding how it is diagnosed is key to resolving discomfort and preventing serious complications, such as gastric ulcers.

While some individuals remain asymptomatic, others suffer from burning sensations, abdominal bloating, nausea, and reduced appetite. Diagnosis is fast and highly reliable, commonly performed using non-invasive techniques such as the urea breath test, or via gastroscopy whenever the specialist needs to examine the stomach lining directly. (If you would like to learn more about the nature of this organism, we recommend reading our dedicated guide on what Helicobacter pylori is).

 

Symptoms of Helicobacter pylori: How to distinguish it from indigestion?

The primary distinction between occasional indigestion and an active H. pylori infection is persistence. This bacterium weakens the protective lining of the stomach, allowing stomach acids to irritate internal tissues and trigger ongoing inflammation (gastritis).

Common symptoms prompting patients to visit our Gastroenterology practice include:

  • Abdominal pain or burning: Often worsening on an empty stomach (between meals or overnight) and temporarily improving after eating or taking antacids.
  • Bloating and early satiety: Feeling overly full after eating only small amounts of food.
  • Frequent burping and nausea: Occasionally accompanied by a persistent unpleasant taste in the mouth.
  • Unintentional weight loss and loss of appetite.

 

Warning signs (When to seek emergency care)

Seek immediate medical attention if the infection leads to a bleeding peptic ulcer, which presents with:

  • Very dark, black, or tarry stools.
  • Vomiting blood or material resembling dark coffee grounds.
  • Severe, acute, and persistent abdominal pain.

 

How is Helicobacter pylori diagnosed?

Detecting this bacterium is straightforward and highly effective. Depending on your age and clinical history, your gastroenterologist will select between non-invasive approaches or endoscopic examinations:

Non-invasive tests (Fast, first-line options)

  • Urea Breath Test: The most common diagnostic method due to its speed and high sensitivity. The patient ingests a tablet or solution containing labeled urea. If the bacteria is present, it breaks down the urea into carbon dioxide, which is captured by exhaling into a specialized collection bag minutes later.
  • Stool Antigen Test: A laboratory evaluation of a stool sample to identify specific bacterial proteins (antigens).

Invasive tests (High diagnostic precision)

  • Gastroscopy (Upper Endoscopy): Recommended if warning signs are present or for patients over 50 years of age. A thin, flexible tube equipped with a high-resolution camera is guided into the stomach to inspect the tissue and collect small biopsy samples.
  • At CreuBlanca, gastroscopies are conducted under deep sedation, ensuring a completely painless experience where the patient sleeps comfortably throughout the procedure.

 

When should you see a specialist?

If you have been relying on antacids for more than two weeks, experience regular heartburn, or find that digestive trouble is disrupting your routine, schedule an evaluation with a gastroenterologist.

At CreuBlanca, we provide integrated care from initial assessment to recovery. During your first consultation, your specialist will evaluate your case and prescribe the appropriate diagnostic method (breath test or gastroscopy). Once confirmed, they will prescribe targeted eradication therapy (typically a combination of antibiotics and acid suppressants) followed by post-treatment testing to confirm the infection is entirely gone.

 

Gastroenterology and Endoscopy experts in Barcelona and Maresme

Are you dealing with persistent digestive distress and need an accurate, definitive answer?

CreuBlanca features a dedicated team of gastroenterologists and modern surgical suites equipped with state-of-the-art endoscopy systems. We deliver fast Helicobacter pylori testing via on-site clinical lab breath tests and painless sedated gastroscopies for maximum comfort.

Our primary centers are located at Clínica CreuBlanca (Barcelona) and Hospital CreuBlanca Maresme (Mataró), offering rapid turnaround on all results. We care for private self-pay patients and accept coverage from over 30 health insurance providers.

Book a consultation with a gastroenterologist here.

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