Patient-Friendly Explanation

After a gastric bypass, the small stomach pouch is joined to the intestine, and that join can develop a sore called a marginal ulcer. It causes burning upper abdominal pain, nausea or black stools, and it is more likely if you smoke, take anti-inflammatory painkillers or have a Helicobacter pylori infection. Treatment is usually acid-suppressing medication plus removing the trigger.

Clinical Definition

Marginal or anastomotic ulceration affects roughly 1 to 5 per cent of Roux-en-Y gastric bypass patients and usually presents one to twelve months after surgery with epigastric pain, dysphagia, nausea or anaemia from chronic blood loss. Key risk factors are Helicobacter pylori infection, smoking, NSAID use, diabetes and a large gastric pouch, with a smaller contribution from anastomotic technique. Diagnosis is by upper endoscopy, and management is proton pump inhibitor therapy, Helicobacter pylori eradication and cessation of NSAIDs and smoking, reserving endoscopic or surgical revision for refractory or perforated cases.

Why It Matters

Because a marginal ulcer can bleed or perforate, new or persistent pain after bariatric surgery should never be waited out. NuLifeCare Singapore tracks red-flag symptoms at follow-up and arranges endoscopy promptly when they appear.