Causes of extreme stomach bloating

Bloating that follows certain meals can reflect lactose intolerance or another food intolerance. Coeliac disease can cause digestive symptoms after gluten exposure, while irritable bowel syndrome may bring bloating with abdominal discomfort and changes in bowel habits. Giardiasis is an infection that may cause prolonged diarrhoea, cramps, and gas. Helicobacter pylori infection can affect the stomach and may be associated with upper abdominal discomfort, nausea, or early fullness. Constipation can leave stool and gas in the bowel, making the abdomen feel tight. The symptom alone does not identify one cause.

Record meals, bowel movements, pain, vomiting, and how quickly the swelling appears. Eat slowly, avoid fizzy drinks if they worsen symptoms, and keep fluids steady unless a clinician has restricted them. Do not remove major food groups for a long period without advice; a nutrition counsellor can help test dietary triggers safely. Arrange a clinical assessment if bloating keeps returning, lasts, or changes your usual bowel pattern.

Seek urgent care for severe or rapidly worsening abdominal pain, repeated vomiting, a hard swollen abdomen, inability to pass stool or gas, blood in the stool, fainting, or breathing difficulty. Prompt medical review is also appropriate with unexplained weight loss, fever, persistent diarrhoea, or yellowing of the skin.

Ask whether your symptom pattern suggests constipation, food intolerance, coeliac disease, infection, or another digestive problem; which tests are appropriate; and which warning signs should change your plan.