What should you know about abnormal bloating?

The feeling may involve abdominal fullness, pressure or visible swelling. Occasional bloating can follow meals or swallowed air, but a new pattern that does not settle should not be managed indefinitely by avoiding more and more foods without assessment.

Bloating can occur when gas accumulates, the bowel contents move differently, or the digestive tract becomes sensitive to stretching. Constipation, food intolerance and irritable bowel syndrome can present with bloating. Coeliac disease, lactose intolerance and some gut infections can also include it, but the symptom alone cannot identify the cause.

Useful clues include whether the abdomen visibly enlarges, whether symptoms relate to particular meals, and whether diarrhoea, constipation, early fullness, nausea or pelvic symptoms occur as well. Medicines, recent infection, menstrual timing and previous abdominal surgery can change the clinical picture, so mention them during an appointment.

Keep a short diary of meals, drinks, bowel movements, discomfort and visible swelling. Note when symptoms begin and what relieves them. Eat at a comfortable pace, reduce habits that make you swallow air, drink enough fluid and use gentle movement if it feels comfortable. Addressing constipation may help when it is part of the pattern.

Avoid starting a highly restrictive diet on your own. Removing several food groups can make nutrition inadequate and can complicate testing for conditions such as coeliac disease. A clinician or dietitian can help choose a structured food trial when intolerance is suspected and decide whether examination, blood tests, stool tests or imaging are appropriate.

Get urgent medical help if bloating comes with severe or rapidly worsening abdominal pain, repeated vomiting, an inability to pass stool or gas, a rigid or very tender abdomen, fainting, breathing difficulty, vomit containing blood, or black or bloody stools. These warning signs need assessment rather than home dietary experiments.

Book a routine appointment if the bloating keeps returning, persists despite simple changes, wakes you from sleep, or occurs with unexplained weight loss, reduced appetite, ongoing diarrhoea or constipation, fever, a new abdominal lump, or a sustained change in bowel habit. Seek earlier advice if you are pregnant, immunocompromised or recently had abdominal surgery.

Ask which features point toward constipation, intolerance, infection or another digestive problem; whether you should continue eating gluten before any coeliac testing; and which warning signs should change the urgency of follow-up. Also clarify whether a dietitian-guided trial would be safer than removing foods independently.