Persistent digestive symptoms
Persistent bloating and gas.Look at the pattern, not one symptom.
Bloating and excess gas are common. They do not point to one diagnosis. Food, fizzy drinks, swallowed air, constipation, food intolerance, coeliac disease and IBS can all play a part. If bloating is frequent, keeps coming back or is changing, look at the full pattern. Then decide with a clinician whether targeted assessment is needed. [1]
Bloating is a symptom, not a diagnosis.
Bloating usually means your abdomen feels full, tight or swollen. Some people can see a change in size. This is called abdominal distension. You may also notice rumbling or more wind. The same symptom can have many causes. Start with the history, not the name of a test.
The NHS says excess gas is a common cause of bloating. Constipation, food intolerance, coeliac disease and IBS can also cause it. Some people feel bloated around a period. A change that does not settle may need a wider medical review rather than being labelled as “just gas”. [1]
Fullness, pressure, tightness or discomfort can occur even when the abdomen does not look larger.
A visible increase in abdominal size is related to bloating but is not exactly the same symptom.
More belching or wind may accompany bloating, but gas alone does not identify the underlying cause.
The pattern helps narrow the possibilities.
Start with simple facts. When did the bloating begin? How often does it happen? What else changes at the same time? A short symptom diary can help. You do not need to start a strict diet before the cause is clear.
| What to notice | Why it matters | What not to assume |
|---|---|---|
| Meals and drinks | Note whether symptoms follow particular meals, fizzy drinks, rapid eating or large portions. | One food association does not prove an allergy or intolerance. |
| Bowel habit | Constipation, diarrhoea, urgency or a change in stool pattern can change which causes need consideration. | Bloating alone does not establish IBS. |
| Pain and relief | IBS is considered in the context of abdominal pain or discomfort and changes related to bowel movements or stool pattern, not from bloating alone. [2] | A familiar pattern should not override new red-flag symptoms. |
| Weight, bleeding or vomiting | Unexplained weight loss, blood in the stool and persistent or severe vomiting need medical assessment. [1] | Do not manage these features only by changing diet. |
| Medicines and supplements | Bring a current list so a clinician can consider whether treatment changes, side effects or interactions are relevant. | Do not stop prescribed medicine because bloating started. |
Could it be IBS, coeliac disease or SIBO?
These labels describe different problems and are not interchangeable. IBS can cause bloating. NICE looks for a wider pattern, including tummy pain or discomfort and a change in bowel habit. Red flags still need assessment. Basic tests may also be needed to rule out another cause. [2]
Coeliac disease can cause bloating, tummy pain, constipation or diarrhoea. NICE recommends blood testing for persistent unexplained gut symptoms. If coeliac disease is being checked, keep gluten in your diet until testing is complete unless your clinician tells you otherwise. Removing gluten too early can make the test less reliable. [3]
SIBO means small intestinal bacterial overgrowth. It can cause bloating in some people. But symptoms alone cannot confirm it. An American Gastroenterological Association review says breath tests may help in selected people at risk. It does not support breath testing for everyone with gas or distension. [5]
Persistent bloating sometimes needs a wider assessment.
Not every cause of abdominal distension comes from the bowel. NICE includes persistent or frequent abdominal distension in the ovarian-cancer symptom pathway for people with female reproductive organs. The concern is greater when it comes with feeling full quickly, pelvic or tummy pain, or needing to pass urine more often. [4]
These symptoms do not mean cancer. But a new, frequent or persistent change should be checked in context rather than repeatedly self-treated as indigestion or food intolerance.
A change in pattern matters.
Tell a clinician if the pattern is changing. Examples include symptoms that are more frequent, last longer, wake you at night, or come with a new bowel change. Also mention weight loss, bleeding, feeling full quickly, pelvic pain or urinary symptoms. The next step depends on the whole picture. It may be simple assessment, a targeted test or a referral.
What is useful to bring to an assessment?
You do not need a diagnosis before an appointment. Bring what you already have. This may include blood results, scan or endoscopy reports, medicines and supplements, and a short symptom note. Also mention food changes you have already tried.
- When the bloating started and whether it is getting more frequent.
- Whether the abdomen visibly distends or mainly feels full or tight.
- Any constipation, diarrhoea, pain, nausea or change in bowel habit.
- Foods or drinks that seem related, without assuming they are the cause.
- Any weight loss, bleeding, early fullness, pelvic symptoms or urinary change.
- What investigations have already been done and what the reports actually said.
If your symptoms persist but are not urgent, read the gut health and persistent digestive symptoms assessment guide. It explains how Dr Stavy assesses the wider picture. Not everyone with bloating needs specialist testing.
What patients say about the consultation experience.
Patient reviews can help you understand how a consultation feels. They do not prove that a treatment works. These short excerpts come from Dr Stavy’s existing public Google review profile.
Individual reviews reflect personal experiences and do not predict your diagnosis, treatment response or outcome.
“patient, understanding and kind”
Google reviewer
“warm and compassionate bedside manner”
Google reviewer
“takes incredible care to get to know her patients”
Google reviewer
Questions about persistent bloating
Is persistent bloating normal?
Occasional bloating is common. The NHS advises seeing a GP if you feel bloated regularly, very bloated or the symptom does not go away. Persistent bloating deserves assessment because several digestive problems can cause it, and the right next step depends on the pattern and any accompanying symptoms. [1]
Does bloating mean I have SIBO?
No. Bloating and gas occur in several digestive problems, so symptoms alone do not establish small intestinal bacterial overgrowth. Specialist guidance describes breath testing for selected people when the clinical context makes SIBO a reasonable question. A universal breath test for everyone with bloating is not recommended. [5]
Can IBS cause bloating?
Yes. Bloating and abdominal distension can occur with IBS, but NICE considers IBS in a wider pattern that includes abdominal pain or discomfort and changes in bowel frequency or stool form. Bloating by itself is not enough to diagnose IBS, and red-flag features require a different assessment route. [2]
Should I stop eating gluten before a coeliac blood test?
Do not start a gluten-free diet before coeliac testing unless your clinician advises it. NICE recommends testing people with persistent unexplained gastrointestinal symptoms and explains that gluten needs to remain in the diet for antibody testing to be reliable. Discuss testing before making a major dietary restriction. [3]
When does bloating need urgent medical care?
Seek urgent help if bloating is accompanied by severe or sudden abdominal pain, vomiting, fever, a new abdominal lump, or an inability to pass urine, stool or wind. Call 999 or go to A&E for sudden severe pain with a swollen abdomen, vomiting blood or severe breathing difficulty. [1]
What should I write down before a gut assessment?
Note when symptoms occur, whether the abdomen visibly distends, any pain or bowel change, foods or drinks that seem related, medicines and supplements, and what previous investigations found. Include weight loss, bleeding, early fullness, pelvic symptoms or urinary changes if present. The aim is to describe the pattern, not to diagnose yourself.
Medical sources and further reading
- NHS: Bloating. Causes, self-care and routine, urgent and emergency assessment routes. Page reviewed 21 January 2026.
- NICE CG61: Irritable bowel syndrome in adults, recommendations. Covers the IBS symptom pattern, red flags and appropriate investigations.
- NICE NG20: Coeliac disease, recognition, assessment and management. Covers testing for persistent unexplained gastrointestinal symptoms and testing while gluten remains in the diet.
- NICE NG12: Suspected cancer, recognition and referral. Includes persistent abdominal distension and associated ovarian-cancer symptom pathways.
- Moshiree B, Drossman D, Shaukat A. AGA Clinical Practice Update on Evaluation and Management of Belching, Abdominal Bloating, and Distention. Gastroenterology. 2023. DOI: 10.1053/j.gastro.2023.04.039.
Persistent symptoms deserve a clearer next step.
If bloating keeps returning, start with the pattern and the information you already have. Then read how persistent digestive symptoms are assessed. This can help you decide whether another test is likely to be useful.