How common is bloating in coeliac disease?

In coeliac disease, eating gluten triggers an immune reaction that can damage the lining of the small intestine. Digestion and absorption may become less efficient, leading to gas, abdominal swelling, loose stools, constipation, nausea, or discomfort. Symptoms can vary, and some people have coeliac disease with few digestive complaints.

Bloating also occurs with constipation, irritable bowel syndrome, food intolerance, and other digestive conditions. Because symptoms overlap, a blood test and sometimes further assessment are used to investigate coeliac disease. Starting a gluten-free diet before testing can affect the results, so discuss the plan with a clinician first.

Book a clinical review if bloating persists, keeps returning, or comes with diarrhoea, unexplained weight loss, tiredness, mouth ulcers, or a close relative with coeliac disease. Keep eating your usual diet until you have discussed testing, unless a clinician has advised otherwise. Record meals, bowel changes, pain, fatigue, and any pattern you notice.

Seek urgent advice for severe or rapidly worsening abdominal swelling, repeated vomiting, inability to pass stool or gas, blood in the stool, fainting, or signs of dehydration. These features are not explained by ordinary bloating alone and may need immediate assessment.

Ask whether coeliac testing is appropriate, whether you should continue gluten before the test, how nutritional deficiencies would be checked, and which other causes of bloating should be considered.