Locating the Pain Helps Identify the Cause
Abdominal pain after eating is a symptom, not a diagnosis — the character, timing, and location are the most useful diagnostic clues. When assessing post-meal pain, note: Where exactly does it hurt? How long after eating does it start? How long does it last? What type of food or amount triggers it?
Upper Middle Abdomen (Epigastric) Pain
Functional Dyspepsia
The most common cause of upper abdominal discomfort — affecting ~20% of the population. Functional dyspepsia is diagnosed when investigations are normal but symptoms of postprandial fullness, early satiety, or upper abdominal pain persist. It is driven by impaired gastric accommodation, delayed gastric emptying, and visceral hypersensitivity. Treatment includes low-dose tricyclic antidepressants, prokinetics (domperidone), or proton pump inhibitors (PPIs), depending on the symptom subtype.
Peptic Ulcer Disease
Duodenal ulcers typically cause pain 1–3 hours after eating (when acid surges into the duodenum) that is relieved by food or antacids. Gastric ulcers cause pain that is worsened by eating. Both are strongly associated with Helicobacter pylori infection and NSAID use. Diagnosis is by endoscopy or H. pylori breath/stool test; treatment is PPI plus eradication antibiotics if H. pylori positive.
Right Upper Quadrant Pain
Gallstones (Biliary Colic)
Sharp, cramping pain in the right upper quadrant or epigastrium, occurring 30 minutes to 2 hours after a fatty meal, lasting 30 minutes to several hours before subsiding. Caused by a gallstone temporarily blocking the cystic duct. Pain may radiate to the right shoulder or back. Gallstones affect ~15% of adults; ultrasound confirms the diagnosis. Cholecystectomy (gallbladder removal) is the definitive treatment for symptomatic stones.
Diffuse or Lower Abdominal Pain
Irritable Bowel Syndrome (IBS)
Pain associated with changes in bowel habit (diarrhoea, constipation, or both) that is often triggered or worsened by eating, particularly large meals, fatty foods, or specific FODMAP foods. Pain typically improves after a bowel movement. IBS affects 10–15% of the population and is managed with dietary modification, antispasmodics, and gut-directed therapies.
Food Intolerances
Lactose intolerance causes bloating, cramps, and diarrhoea 30–120 minutes after dairy consumption due to insufficient lactase enzyme. Non-coeliac gluten sensitivity and coeliac disease (autoimmune gluten intolerance) cause abdominal discomfort, bloating, and altered bowel habit after gluten-containing foods. Coeliac disease requires blood testing (anti-tTG IgA antibodies) and duodenal biopsy to diagnose.
Gastroparesis
Delayed gastric emptying — the stomach empties too slowly — causes early satiety, bloating, nausea, and upper abdominal fullness or pain beginning during or shortly after meals and lasting for hours. Common in long-standing diabetes (from autonomic nerve damage) and after certain viral illnesses. Diagnosed by a gastric emptying scintigraphy study.
Red Flags: See a Doctor Promptly
- Pain severe enough to prevent activity or waking you from sleep
- Unintentional weight loss
- Difficulty swallowing
- Black/tarry or bloody stools
- Persistent vomiting
- Jaundice (yellow skin or eyes)
- New symptoms in someone over 50 (raises concern for malignancy)