VHOSPITAL.CLINIC · Differential Diagnosis
GERD (Acid Reflux) vs Peptic Ulcer
Clinical comparison — shared symptoms, key differences, distinguishing diagnostic tests, treatment pathways, and when to seek urgent evaluation.
Condition Overview
Condition A
GERD (Acid Reflux)
Gastroesophageal reflux disease (GERD) is a chronic condition where stomach acid flows back into the esophagus, causing heartburn, regurgitation, and chest discomfort. Long-term untreated GERD can lead to esophageal damage.
Condition B
Peptic Ulcer
Peptic ulcers are open sores that develop on the inner lining of the stomach or the upper part of the small intestine. H. pylori infection and long-term NSAID use are the most common causes. They cause burning stomach pain, especially when the stomach is empty.
Shared Symptoms — Why They're Confused
Both conditions present with 2 overlapping symptoms, making clinical differentiation essential.
Key Clinical Differences
GERD (Acid Reflux)
- Heartburn and nausea
- Chest discomfort
- Worse after meals and lying flat
- H. pylori can be associated
Peptic Ulcer
- Epigastric pain related to meal timing (DU: hunger pain; GU: postprandial)
- Haematemesis or melaena (bleeding ulcer)
- H. pylori strongly associated (90% DU)
- Endoscopy shows discrete mucosal break
Distinguishing Diagnostic Tests
| Test | GERD (Acid Reflux) | Peptic Ulcer |
|---|---|---|
| Endoscopy (OGD) | Oesophageal erythema, erosions, or Barrett's — no gastroduodenal ulcer | Discrete ulcer crater in gastric or duodenal mucosa |
| Ambulatory pH-impedance monitoring | Abnormal acid exposure time in distal oesophagus (>4%) | Normal oesophageal pH — gastroduodenal pathology only |
| H. pylori test | Less strongly associated than peptic ulcer | Positive in >80% — eradication heals the ulcer |
Treatment Approaches
GERD (Acid Reflux)
- •Lifestyle: weight loss, elevate head of bed, avoid triggers
- •PPIs 4–8 weeks
- •H2 antagonists for maintenance
- •Anti-reflux surgery (Nissen) for refractory cases
Peptic Ulcer
- •PPI 4–8 weeks
- •H. pylori eradication triple therapy
- •Avoid NSAIDs and aspirin
- •Repeat endoscopy for gastric ulcer
When Doctors Consider Each Diagnosis
🔵 Consider GERD (Acid Reflux) when:
- →Burning retrosternal heartburn, worse lying flat, waterbrash, no haematemesis
🟢 Consider Peptic Ulcer when:
- →Epigastric ulcer pain with clear meal-related timing, haematemesis risk, H. pylori positive
Explore Each Condition in Detail
Related Clinical Pages
GERD (Acid Reflux)
Medical References
Content on this page is informed by evidence-based clinical sources including:
- World Health Organization (WHO)Global health guidance and disease classification
- National Health Service (NHS)UK clinical guidelines and patient information
- National Institute for Health and Care Excellence (NICE)Evidence-based clinical practice guidelines
- Centers for Disease Control and Prevention (CDC)US public health data and clinical recommendations
- PubMed – NCBIPeer-reviewed biomedical literature and clinical studies
- Cochrane LibrarySystematic reviews and meta-analyses in evidence-based medicine
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