Q. What causes belching?
Doctor Answer is medically reviewed by SecondMedic medical review team.
Belching, also known as burping, is the release of air from the stomach or esophagus through the mouth. It's a natural bodily function that helps expel excess gas that builds up in the digestive system. This gas can come from swallowed air or from the breakdown of certain foods by gut bacteria.
Here's a breakdown of the common causes of belching:
Swallowing Air:
- This is the most frequent culprit behind belching. Air can be swallowed unintentionally during various activities:
- Eating too quickly: When you rush through your meals, you take in more air alongside your food.
- Talking while eating: Chewing and talking simultaneously increases the chance of air sneaking in.
- Chewing gum: The constant chewing motion can lead to swallowing excess air.
- Sucking on hard candies: Similar to gum, sucking on hard candies can cause you to swallow more air.
- Smoking: The act of smoking involves inhaling and exhaling, which can lead to swallowing air unintentionally.
- Ill-fitting dentures: Dentures that don't fit properly can create gaps that allow air to enter the esophagus while eating.
- Anxiety and stress: During anxious or stressful moments, you might hyperventilate, leading to increased air intake and belching.
Dietary Factors:
- Certain foods are more likely to cause gas and belching due to the way they are broken down in the gut. These include:
- Carbonated beverages: Drinks like soda or beer contain dissolved gas (carbon dioxide) that is released in the stomach, causing belching.
- High-fiber foods: Beans, lentils, cruciferous vegetables (broccoli, cauliflower, cabbage), and some fruits can produce gas during digestion by gut bacteria.
- Foods with artificial sweeteners: Sugar alcohols like sorbitol and mannitol, found in sugar-free candies and gums, are not fully absorbed by the small intestine and can be fermented by gut bacteria, leading to gas production.
- Dairy products: People with lactose intolerance lack sufficient lactase, an enzyme needed to break down lactose (sugar) in milk products. This can lead to gas and belching.
Digestive Issues:
- In some cases, belching can be a symptom of an underlying digestive condition:
- Gastroesophageal reflux disease (GERD): When stomach acid flows back up into the esophagus (heartburn), it can irritate the lining and cause belching as a reflex to relieve discomfort.
- Peptic ulcers: These sores in the stomach lining can trap gas and make belching more frequent.
- Small intestinal bacterial overgrowth (SIBO): An excessive amount of bacteria in the small intestine can lead to fermentation of undigested food particles, causing gas and belching.
If you experience frequent or excessive belching, especially if accompanied by other symptoms like heartburn, stomach pain, or nausea, it's important to consult gastroenterologist to rule out any underlying medical conditions.
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