Why does coeliac disease cause bloating?

When the small-intestinal lining is affected, food may be processed differently and material can reach the bowel in a form that increases gas production. Bloating may feel like tightness, fullness, visible distension, or pressure. It can occur with abdominal pain, diarrhoea, constipation, wind, nausea, tiredness, or no obvious additional digestive symptom.

Bloating is a common presentation of Coeliac Disease. Bloating is also common with dietary changes, constipation, irritable bowel syndrome, and other conditions, so it cannot identify the cause by itself.

Make an appointment if bloating is frequent, persistent, or accompanied by other digestive changes. If coeliac disease is a possibility, continue your usual diet until a clinician advises otherwise, because gluten avoidance before testing can interfere with assessment. They may discuss blood testing and whether another cause needs investigation.

A food and symptom diary can be helpful. Note meals, bloating severity, bowel changes, menstrual timing where relevant, and any medicines or supplements. Avoid assuming that a restrictive diet is necessary without personalised advice.

Seek urgent medical care for severe abdominal pain, a markedly swollen and tender abdomen, vomiting that prevents fluids staying down, fainting, black or bloody stools, or breathing difficulty. Arrange prompt review for unexplained weight loss, persistent vomiting, fever, a new abdominal lump, or a sustained change in bowel habit.

Could coeliac disease or another digestive condition explain my bloating? Should I have testing before changing what I eat? Which symptoms would mean I need more urgent assessment?