How much gas is normal?
Passing gas is normal. Most healthy adults pass gas many times a day, commonly cited as about 13 to 21 times, and belch occasionally after meals. The amount varies with diet and habits. Gas is considered excessive when it is noticeably more than usual for you, comes with pain or bloating, or interferes with daily life.
What causes excessive gas and bloating?
Excessive gas and bloating usually come from swallowing extra air, from eating foods that ferment in the colon, or from both. Common causes include eating quickly, carbonated drinks, chewing gum, smoking, beans, cruciferous vegetables, onions, wheat, high-fructose fruits, sugar alcohols, lactose intolerance and constipation. Medical causes include irritable bowel syndrome, small intestinal bacterial overgrowth, celiac disease, pancreatic insufficiency and slow stomach emptying.
| Symptom | What it is | Common causes |
|---|---|---|
| Belching (burping) | Air released from the stomach or esophagus | Swallowed air, carbonated drinks, reflux |
| Flatulence | Gas passed from the rectum | Fermentation of carbohydrates in the colon |
| Bloating | A feeling of fullness, pressure or tightness | Gas, constipation, gut sensitivity, IBS |
| Distension | A visibly swollen abdomen | Gas, constipation; persistent cases need evaluation |
Two main sources of excessive gas
- Air inFast eating, gum, straws, soda and smoking add swallowed air.
- Gas madeBacteria ferment undigested carbohydrates, especially with intolerances.
- Gas trappedConstipation and slow movement hold gas in, increasing bloating.
Why does my gas smell so bad?
Most gas is odorless. The smell comes from small amounts of sulfur-containing compounds produced when bacteria break down foods such as eggs, meat, cruciferous vegetables, garlic and onions. Foul-smelling gas with greasy, floating or pale stools, diarrhea or weight loss can be a sign of malabsorption, such as celiac disease or pancreatic insufficiency, and should be evaluated.
Have symptoms like these?
Dr. Muhammad Ali Khan, a board-certified gastroenterologist and hepatologist, sees adults at our Katy and Cypress offices, serving patients across Greater Houston.
How can I reduce excessive gas?
To reduce excessive gas, eat slowly, skip gum, straws and carbonated drinks, stop smoking, identify and reduce trigger foods one at a time, add fiber gradually, treat constipation and stay active. Lactase enzymes help with dairy, alpha-galactosidase helps with beans, and a dietitian-guided low-FODMAP trial can help people with IBS.
- Eat smaller meals slowly and chew well
- Replace soda and sparkling water with still water
- Limit sugar-free gum and candy with sorbitol or xylitol
- Test dairy, beans and wheat one at a time
- Walk after meals
Tip: Separate belching from flatulence
Note whether your main problem is burping or passing gas. Burping usually points to swallowed air or reflux, while flatulence points to diet and fermentation, so the fixes are different.
When is excessive gas a sign of a medical problem?
Excessive gas may point to a medical problem when it comes with ongoing diarrhea or constipation, abdominal pain, greasy or foul-smelling stools, unexplained weight loss, anemia, blood in the stool, or bloating that keeps getting worse. These patterns can suggest IBS, SIBO, celiac disease, lactose intolerance, pancreatic insufficiency or, less commonly, other conditions that need testing.
See a doctor for
- Gas with weight loss, anemia or greasy, floating stools
- Blood in the stool or black stools
- Severe or worsening abdominal pain or swelling
- New bowel changes after age 45
How is the cause of excessive gas found?
A gastroenterologist reviews your diet, habits and bowel pattern and may order blood tests for celiac disease and anemia, breath tests for lactose or fructose intolerance and SIBO, stool tests for fat absorption, and sometimes an endoscopy or colonoscopy. Treatment is then targeted to the cause.
Learn about relieving gas and bloating and greasy stool and pancreas health.
Get answers instead of guessing
Request a visit with Dr. Muhammad Ali Khan at our Katy and Cypress offices. Most major insurance plans are accepted and self-pay options are available.
Key takeaways
- Passing gas many times a day is normal; excessive gas is more than usual for you or causes symptoms.
- Swallowed air and fermentation of certain foods cause most excessive gas.
- Belching, flatulence and bloating have different causes and fixes.
- Gas with greasy stools, weight loss, anemia or bleeding needs evaluation.
- Breath, blood and stool tests can identify intolerances, SIBO and malabsorption.
Frequently asked questions
Is it normal to fart a lot?
Passing gas often can be normal, especially with a high-fiber diet. If it suddenly increases or comes with pain, diarrhea or weight loss, see a doctor.
Why do I have so much gas at night?
Gas often builds through the day as food is digested and fermented, so many people notice more in the evening. Large or late dinners make it more likely.
Can excessive gas be caused by stress?
Stress can increase swallowed air and gut sensitivity, which can make gas and bloating feel worse.
Does fiber cause gas?
Adding fiber quickly can cause gas. Increasing it gradually and drinking enough water usually prevents this.
Do I need a referral to see a gastroenterologist in Katy or Cypress?
It depends on your insurance plan. Many PPO plans let you book a specialist directly, while some HMO plans require a referral from your primary care doctor. Call (346) 340-4414 and the team can help you check.
Sources
- NIDDK — Gas in the digestive tract
- MedlinePlus — Gas
- NIDDK — Lactose intolerance
- NIDDK — Celiac disease
- MedlinePlus — Malabsorption syndromes
- American College of Gastroenterology — IBS
Where to be seen in Katy and Cypress
United Gastroenterology Associates has two offices: Katy, at 23920 Katy Freeway, Suite 555, next to Memorial Hermann Katy Hospital, and Cypress, at 21216 Northwest Freeway, Suite 640, on US-290. Both are open Monday through Friday, 8:30 AM to 5:00 PM, closed for lunch from 12:00 to 1:30 PM, and serve patients from Fulshear, Richmond and across Greater Houston. Call (346) 340-4414 for either office.
Katy office
23920 Katy Freeway, Suite 555
Katy, TX 77494
Memorial Hermann Medical Plaza 1
Next steps
If you are dealing with excessive gas and bloating or any ongoing digestive concern, a focused evaluation can find the cause and start the right treatment. Dr. Muhammad Ali Khan and the team at United Gastroenterology Associates see adults from Katy, Cypress, Fulshear, Richmond, Greater Houston and across Texas. Call (346) 340-4414 or request an appointment today.
If you have severe pain, vomit blood, pass black stools or have chest pain, call 911 or go to the nearest emergency room.
