519-208-2273

Bloating & Gas: who to see and what helps

Bloating & Gas · Kitchener, Waterloo & Cambridge

Bloating is a feeling of pressure, fullness or trapped gas in the abdomen, sometimes with a belly that visibly swells. When it keeps coming back and no disease is found, a 2025 European expert consensus backs a low-FODMAP diet, as a weak recommendation resting on trials in irritable bowel syndrome, and American specialists want a trained dietitian running it. The usual first visit at CARESPACE is with a Registered Dietitian or a Naturopathic Doctor; a Nurse Practitioner can arrange tests.

What bloating is

Bloating is the sensation: pressure, fullness, trapped gas. Distension, which often comes with it, is a measurable increase in the size of the abdomen. Neither tracks consistently with how much gas is in the bowel: a gut that senses its contents more strongly is thought to matter more than extra gas.

Bloating that is recurrent, is the main complaint and has no disease behind it is called functional bloating. It also comes as part of other conditions: studies put it at 66% to 90% of people with irritable bowel syndrome.

Symptoms of bloating

  • A tummy that feels full or bigger than usual
  • Pain or discomfort in the abdomen
  • A rumbling or noisy stomach
  • Passing gas more than usual
  • A belly that visibly swells for a time and goes down again (distension)

What causes bloating and gas

  • Gas in the gut, from some foods and drinks or from swallowing air while eating. This is the usual cause.
  • Constipation.
  • A food intolerance.
  • Celiac disease.
  • Irritable bowel syndrome.
  • Hormones. Some people bloat around their period.
  • Stress, anxiety and depression, which can sharpen how bloating is felt and how much it interferes.

Lunch eaten hunched over a keyboard, a familiar habit in the region’s tech offices, is the slouching while you eat that is on the list of things to avoid.

How bloating is worked out

Mostly by questions, a look at what you eat and an examination. A blood test can rule out celiac disease; do not cut out gluten until celiac testing is complete. Scans and endoscopy are for people with warning features, symptoms that have recently worsened or an abnormal examination. Stool tests that profile gut bacteria give no useful information about bloating and should not be used.

Sometimes, bloating that does not go away can be a sign of something more serious, such as ovarian cancer. The Canadian Cancer Society lists bloating, swelling of the abdomen and feeling full after a small meal among its symptoms, and an American Gastroenterological Association expert review puts the highest risk in women 50 and older. If that describes you and the bloating is new and persistent, tell a physician or nurse practitioner.

When bloating needs urgent help

Call 911 if you have signs of a heart attack. A burning chest is not always reflux: reflux can cause chest pain that is indistinguishable from heart pain. The Heart and Stroke Foundation of Canada lists the signs as chest discomfort (pressure, squeezing, fullness, pain, burning or heaviness), sweating, discomfort in the neck, jaw, shoulder, arms or back, nausea, shortness of breath and light-headedness. Call 911 as well for sudden, severe chest pain, or if you are struggling to breathe: gasping, choking or unable to get your words out.

Go to an emergency department now if you are vomiting bright red blood or something that looks like ground coffee, if your stools are black, sticky and very smelly, if there is red or maroon blood mixed with your stool or heavy bleeding from the rectum, or if you have severe abdominal pain that came on suddenly. Bleeding inside the stomach or bowel can also show as feeling tired, short of breath or light-headed, with cramps or pain in the abdomen: go if you have any of those along with blood. Do not drive yourself: ask someone to take you, or call 911.

The emergency departments in Waterloo Region are:

  • WRHN @ Midtown (formerly Grand River Hospital), 835 King St. W., Kitchener
  • WRHN @ Queen’s Blvd. (formerly St. Mary’s General Hospital), 911 Queen’s Blvd., Kitchener
  • Cambridge Memorial Hospital, 700 Coronation Blvd., Cambridge

If you cannot get there safely, call 911.

See a physician or nurse practitioner the same day, or go to an urgent care clinic, if you have lost your appetite, feel full after a very small meal, have recently lost weight without trying, can feel a lump in your abdomen, find it painful or difficult to swallow, or keep vomiting. This list is the one the NHS, the UK’s health service, asks people to get an urgent appointment for; the emergency department list above is its emergency list plus the bleeding signs given by American and Canadian digestive health sources.

With bloating, the NHS adds to that same-day list: bloating with vomiting, diarrhea or constipation; bloating with a stomach ache; a fever, or feeling hot, cold or shivery; a lump, or a swelling in the abdomen that does not go down; being unable to pass urine, stool or gas; and bloating with the burning of acid reflux.

Book an appointment with a physician or nurse practitioner if you feel bloated regularly, or have changed your diet and are still bloated. See one promptly about small amounts of red blood with a bowel movement when none of the emergency signs above apply.

What the evidence says about treating bloating

Two documents cover the field, and neither claims strong evidence. The European consensus (21 specialists, 2025) is about functional bloating, and most of its statements rest on expert opinion. An American Gastroenterological Association expert review (2023) gives advice without formal ratings. Where they agree, the point is stated once; where they differ, you get both.

  • Low-FODMAP diet. The European consensus rates it effective in reducing functional bloating and distension. That is a weak recommendation on moderate evidence, and the evidence comes from irritable bowel syndrome, because studies in bloating without it are lacking. The American review says the diet, reintroduction included, should be run by a trained dietitian or gastroenterology provider. Two risks are named: nutritional deficiencies and eating-disorder behaviour.
  • Lactose. A trial of limiting lactose is supported if you notice symptoms with it or a breath test shows intolerance. For functional bloating in general it is of limited help.
  • Gluten-free diet. Insufficient evidence to recommend it unless you have celiac disease.
  • Probiotics. Here they differ. The American review says probiotics should not be used to treat bloating, and that they may be associated with new brain fogginess, bloating and lactic acidosis. The European one says selected probiotics may improve it, on low-quality evidence, that products differ so much that results from one cannot be applied to another, and that effects are modest. Prebiotics have no encouraging data and may make symptoms worse.
  • Simethicone, peppermint oil and herbal products. Peppermint oil and some herbal medicines have reduced bloating in people with irritable bowel syndrome, but there is insufficient evidence to recommend them, or simethicone, for functional bloating. The peppermint trials, all in irritable bowel syndrome, point both ways: a sustained-release product improved bloating in one, and another found no improvement at six weeks.
  • Exercise. Aerobic exercise seems to have a positive effect on gut symptoms, though substantial trial evidence is lacking.
  • Constipation. If you are constipated, treating that should be considered as a treatment for the bloating. See Constipation.
  • Psychological and breathing-based treatment. They differ again. The American review says hypnotherapy, cognitive behavioural therapy and other brain-gut therapies may be used, and diaphragmatic breathing for a muscle-coordination problem called abdominophrenic dyssynergia. The European one is narrower: cognitive behavioural therapy can be offered when bloating comes with irritable bowel syndrome and other treatment has not worked, and hypnotherapy, which improves bloating in irritable bowel syndrome, cannot be recommended where it has not been studied.
  • If your bloating is part of irritable bowel syndrome, the Canadian guideline’s positions apply: it suggests peppermint oil, probiotics, cognitive behavioural therapy and hypnotherapy, suggests against herbal remedies and recommends against acupuncture. The IBS page covers them.
  • Prescription medicines are an option in both. They are prescribed by a physician or nurse practitioner.

How each CARESPACE service helps with bloating

Nutrition & Dietitian

A Registered Dietitian can take a detailed food history and turn it into a proper trial: a low-FODMAP restriction followed by step-by-step reintroduction, or a period of limiting lactose, with a clear read at the end on what made a difference. Keeping the diet adequate while foods are out is part of the job. Where constipation is involved, they can look at fibre and fluids.

See our dietitians →

Naturopathic Medicine

Naturopathic Doctors look at bloating alongside sleep, stress and overall health, and can order bloodwork and go through the results with you. On products, the evidence is thin outside irritable bowel syndrome: probiotics are contested and carry the cautions above, and peppermint oil, herbal medicines and simethicone lack evidence in functional bloating. Fad diets and herbal therapies can lead to malnutrition or toxicity. Talk to a pharmacist, physician or nurse practitioner before starting any of them.

See our naturopathic doctors →

Nurse Practitioner

A Nurse Practitioner can examine you, order the celiac blood test and other bloodwork that fits your situation, arrange a scan or referral when a warning feature is present, and prescribe, for instance for constipation.

See our Nurse Practitioner service →

Other services people ask about

Acupuncture. The European panel notes that acupuncture reduced bloating in some studies of people with irritable bowel syndrome, with a considerable placebo effect, and finds insufficient evidence to recommend it for functional bloating. The Canadian Association of Gastroenterology’s guideline recommends against offering acupuncture for irritable bowel syndrome. Counselling. CARESPACE counsellors offer cognitive behavioural therapy.

Where most people start

Start with a Registered Dietitian or a Naturopathic Doctor if the bloating seems tied to food and none of the warning signs above apply. See a Nurse Practitioner or your physician first if the bloating is new and persistent, especially after 50.

How your team works together

A dietitian runs the diet trial. A Nurse Practitioner covers what a diet cannot answer: the celiac test before gluten comes out, bloodwork, and constipation that needs medicine.

  1. Next available: Nov 21

    Samantha Rocca, BASc, PMDip, RD

    Dietitian

    CARESPACE Waterloo GoodLife

    When food feels confusing, stressful, or harder than it should, Samantha Rocca, BASc, PMDip, RD helps you make sense of it in a way that feels practical, compassionate,…

    Book now About Samantha

Browse by service: dietitians, naturopathic doctors and Nurse Practitioner.

What to expect at your first visit

  1. The pattern. When in the day it builds, whether your belly visibly swells, and how your bowels have been.
  2. What you eat. Typical meals, drinks and timing, and anything you have already cut out.
  3. Tests so far. Bring any results, particularly a celiac test.
  4. A plan to leave with. If you have not had a celiac test, ask a Nurse Practitioner or your physician about one before you cut out gluten.

What you can do at home

  • Exercise regularly, including when you feel bloated.
  • Eat smaller, more frequent meals, and avoid large meals late at night.
  • Chew with your mouth closed, and sit up to eat.
  • Drink plenty of water. If you are constipated, eat foods high in soluble fibre, such as oats or linseed.
  • Go easy on fizzy drinks, alcohol and caffeine.
  • Go easy on gas-forming foods, like cabbage, beans and lentils, and on processed, sugary, spicy or fatty foods.
  • Massage your abdomen from right to left to help release trapped gas.
  • A pharmacist can advise on a laxative for constipation, or on simethicone, though the evidence for simethicone is thin.

Outlook

None of the sources gives a timeline, and functional bloating is described as a challenging target to treat. Where there is a cause, treatment depends on it, and often none is needed.

Bloating treatment in Kitchener, Waterloo and Cambridge

Kitchener. Nutrition in Kitchener and Naturopathic Medicine in Kitchener. Locations: Victoria North, Fischer-Hallman, Westmount East and Deer Ridge.

Waterloo. Nutrition in Waterloo, Naturopathic Medicine in Waterloo and Nurse Practitioner in Waterloo. Locations: Weber North, Uptown Waterloo and Waterloo GoodLife.

Cambridge. Nutrition in Cambridge and Naturopathic Medicine in Cambridge. Location: Hespeler Road.

The city pages linked above show the locations and practitioners for each service, with their next availability.

Common questions

What foods cause bloating and gas?

Commonly fizzy drinks, alcohol, caffeine, cabbage, beans, lentils and processed, sugary, spicy or fatty foods. The reintroduction phase of a low-FODMAP trial is how your own are identified.

Is a gut microbiome test worth doing for bloating?

No. Stool tests that profile gut bacteria do not provide useful information for diagnosing bloating and should not be used. A blood test for celiac disease is the one to ask about, and for irritable bowel syndrome the Canadian guideline recommends against food allergy testing as a way to find triggers.

Should I go gluten-free?

Not before a celiac test. There is insufficient evidence for a gluten-free diet in functional bloating unless you have celiac disease.

Is bloating the same as IBS?

No. Irritable bowel syndrome is abdominal pain with diarrhea or constipation that comes back again and again, and most people who have it also bloat. Functional bloating is when bloating is the main problem.

Can I see a dietitian about bloating in Cambridge?

Yes. See Nutrition in Cambridge or Naturopathic Medicine in Cambridge, or call 519-208-2273 and our Central Reception Team will find the closest location with an opening.

Do I need a referral?

No. Book online or call 519-208-2273. You pay at each visit and receive a receipt for your extended health plan. More on fees and insurance →

Sources

Related conditions

Digestive Issues & Gut Health
Irritable Bowel Syndrome
Constipation
Celiac Disease
Acid Reflux & GERD

The CARESPACE Central Reception Team

Ready to book?

Book online with a Registered Dietitian or a Naturopathic Doctor, or call 519-208-2273 and our Central Reception Team will match you with the right person and the closest location.

Online booking
Call 519-208-2273