The main cause of gas in the stomach is swallowing air while eating or drinking. This air, consisting mostly of nitrogen and oxygen, gets trapped in the stomach.
Here's a more detailed breakdown:
Where Does Stomach Gas Come From?
- Swallowed Air: This is the primary source of stomach gas. You swallow small amounts of air throughout the day, but you swallow more when you:
- Eat or drink too quickly.
- Talk while eating.
- Chew gum.
- Suck on hard candies.
- Drink carbonated beverages.
- Smoke.
- Wear poorly fitted dentures.
- Normal Digestive Processes: Some gas is also a byproduct of normal digestion, but this primarily occurs in the large intestine (colon), not the stomach.
What Happens to Stomach Gas?
Most of the gas that accumulates in the stomach is released through burping. A small amount may pass into the small intestine and eventually the colon, where it may be absorbed or expelled as flatulence.
Gas in the Large Intestine (Colon)
It's important to distinguish between gas in the stomach and gas in the large intestine. While the stomach gas is mainly from swallowed air, gas in the colon primarily results from the fermentation of undigested carbohydrates (like fiber, some starches, and sugars) by bacteria.
When to Worry About Gas
While gas is a normal bodily function, excessive gas accompanied by other symptoms warrants a doctor's visit. See a doctor if gas is associated with:
- Persistent abdominal pain.
- Bloody stools.
- Changes in bowel habits.
- Weight loss.
- Heartburn.
- Nausea or vomiting.
