Leo Treyzon, MD -  - Gastroenterologist

Leo Treyzon, MD

Gastroenterologist & Clinical Nutrition Specialist located in Cedars Sinai Medical Towers & West Los Angeles, Los Angeles, CA

Gas And Bloating Specialist

Gas and bloating are more than annoying and embarrassing. They can be signs of more serious underlying conditions. Dr. Treyzon helps patients in and around the Cedars Sinai Medical Towers, Los Angeles, CA, area identify the causes of their gas and bloating so they can get the most appropriate care based on their unique needs.

Gas and Bloating Q&A

What is Gas?

Digestive problems of gas usually present in one or more of three ways:

  • Frequent belching of air from the stomach (belching)
  • Bloating of the abdomen after eating (bloating)
  • Frequent passing of gas from the rectum (rectal gas)

Gas is caused by either swallowed air and/or as a consequence of the normal breakdown of food by harmless bacteria into forms that can be used by the body. Although gas is not usually indicative of a serious problem, it can be a symptom of an underlying issue, including irritable bowel syndrome (IBS), small intestinal bacterial overgrowth (SIBO), inflammatory bowel disease, gallbladder problems, GERD, and food allergies or food intolerances, to name a few. In a few cases, bloating may also be related to a blockage in the bowel that prevents the normal passage of gas. 

What is Belching?

Burping or belching is the result of too much air in the stomach. Small amounts of air are swallowed when eating and drinking. However, some people swallow more air during these activities than others, and accelerated eating and drinking can cause excess air to be swallowed.

What is Bloating?

Bloating is often described as a feeling of swelling in the abdomen. Sometimes gas moves too slowly through the digestive tract as a result of poor motility, resulting in bloating. Motility refers to the contractions that automatically move food through the digestive tract. This accumulation of gas in the intestines resulting from slow transit can cause increased stretching of the bowel walls, leading to abdominal discomfort that we perceive as bloating.

What is Rectal Gas?

Rectal gas is most often produced by bacteria in the colon (the large intestine). These bacteria are beneficial to the digestion of our food and essential to the production of certain vitamins. In the process of breaking down carbohydrates (sugars) for their nutrition, bacteria generate gases such as hydrogen, carbon dioxide, methane, and hydrogen sulfide. These gases are normally harmless, but can be problematic when produced in excessive amounts. 

What Can I do to Prevent Gas, Bloating, and Belching?

Gas, bloating, and belching that are related to the normal digestion of food may be reduced by avoiding foods and beverages known to cause gas, including beans and other high-fiber foods, and carbonated drinks. Taking time to chew your food properly before swallowing can help by breaking down food into more easily digestible pieces, and it can also help prevent you from swallowing air while you eat. 

What Should I do if I have Chronic Gas, Bloating, and Belching?

If you experience regular bouts of gas, bloating, and/or belching you should be evaluated for the presence of a digestive disorder or disease that could be causing these symptoms. During your evaluation, you'll be asked about your symptoms, how often they occur, and if they're accompanied by pain or other symptoms. You'll also be asked to provide a medical history to look for clues. A digestion breath test is often ordered in patients with these sets of symptoms. In some cases, diagnostic imaging tests like ultrasound or CT scans may be ordered, and diagnostic procedures like colonoscopy or endoscopy may also be ordered. Based on those results, a treatment plan can be recommended which may include medication, dietary or other lifestyle changes, or surgery.


One very common cause of gas and bloating is small intestinal bacterial overgrowth (SIBO). SIBO is tested for using a lactulose hydrogen breath test-kit, which is often take-home.

Insurance Accepted

Here is a list of just some of the plans we accept, please contact our office if you have any questions.

Anthem Blue Cross of California
Director's Guild (DGA)
Motion Picture Industry Health Plan
United Healthcare
Writers Guild

Words from our patients

  • "I couldn't wait to log onto Yelp to give him a much deserving review. He is fantastic!"

    Helen S. - Yelp
  • "I'm amazed at how caring and helpful Dr. Treyzon is. It all started with an email inquiry to his receptionist Amie (who is also very kind and quickly replies to email)."

    Neirreth J. - Yelp
  • "Dr. Treyzon is one of the absolute best doctors I've ever been to. He's got a great bedside manner, he is intelligent, honest, listens and is an all around great guy."

    Beth Q. - Yelp
  • "Dr. Treyzon is one of the only doctors I've ever met that truly listens to his patients and doesn't give up on figuring out what's wrong."

    H.H. - Yelp
  • "Dr. Treyzon is one of the most responsive and thorough doctors I have dealt with. I've seen 5 different gastroenterologists across CA and MA, Dr. Treyzon is the best..."

    Matt M. - Yelp
  • "Dr. Leo Treyzon is an extremely intelligent, likeable and dilligent doctor. He is always on the cutting edge of the latest treatments and technologies."

    Sean S. - Yelp
  • "Great doctor. Great crew. Cannot recommend more highly!"

    J. Marvin C. - Yelp
  • "He is kind, doesn't rush me, listens to my concerns, and is systematic in his diagnoses."

    Mrs. S. - Yelp
  • Dr. Treyzon actually spent an incredible amount of time researching my rather arcane issue and then came up with a creative and innovative solution."

    Baruch T. - Yelp
  • "My OB-GYN referred me to Dr. Treyzon, and I have to say, he was absolutely wonderful."

    Julie S. - Yelp
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