On this page

Basics

• Summary
• Start Here
• Treatments and Therapies

Learn More

• Living With

See, Play and Learn

• No links available

Research

• Clinical Trials
• Journal Articles

Resources

• Reference Desk
• Find an Expert

For You

• Children
• Patient Handouts

Summary

Everyone has gas. Most people pass gas 13 to 21 times a day. Passing gas through the mouth is called belching or burping. Passing gas through the anus is called flatulence. Most of the time gas does not have an odor. The odor comes from bacteria in the large intestine that release small amounts of gases that contain sulfur.

Gas in the digestive tract comes from two sources: air that you swallow and the breakdown of undigested food by bacteria in the large intestine. Certain foods may cause gas. Foods that produce gas in one person may not cause gas in another.

You can reduce the amount of gas you have by:

• Drinking lots of water and non-fizzy drinks
• Eating more slowly so you swallow less air when you eat
• Avoiding milk products if you have lactose intolerance

Medicines can help reduce gas or the pain and bloating caused by gas. If your symptoms still bother you, see your health care provider.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Start Here

• Belching, Bloating and Flatulence (American College of Gastroenterology) Also in Spanish
• Gas in the Digestive Tract (National Institute of Diabetes and Digestive and Kidney Diseases) Also in Spanish

Treatments and Therapies

• Treatment of Gas (International Foundation for Gastrointestinal Disorders)

Living With

• Foods Likely to Cause Gas (International Foundation for Gastrointestinal Disorders)

Clinical Trials

• ClinicalTrials.gov: Flatulence (National Institutes of Health)

Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)

• Article: Food passageway-related sequelae in the RefluxStop prospective multicenter trial: patient-centric outcomes...
• Article: Belching, bloating, and flatulence: pitfalls and challenges in evaluating and managing...
• Article: Rumination Syndrome, Supragastric Belching, and Abdominophrenic Dyssynergia: How to Diagnose and...
• Gas -- see more articles

Reference Desk

• Your Digestive System and How It Works (National Institute of Diabetes and Digestive and Kidney Diseases) Also in Spanish

Find an Expert

• Find a Gastroenterologist (GI Doctor) (American College of Gastroenterology)
• National Institute of Diabetes and Digestive and Kidney Diseases

Children

• Burping Your Baby (Nemours Foundation) Also in Spanish
• What's a Fart? (Nemours Foundation) Also in Spanish
• Why Do I Burp? (Nemours Foundation) Also in Spanish

Patient Handouts

• Abdominal bloating (Medical Encyclopedia) Also in Spanish
• Belching (Medical Encyclopedia) Also in Spanish
• Bland diet (Medical Encyclopedia) Also in Spanish
• Gas - flatulence (Medical Encyclopedia) Also in Spanish