First, let’s talk about why your stomach might actually love sparkling water. If your upset stomach comes from overeating or indigestion—you know, that heavy, stuck feeling like a brick is sitting in your gut—carbonation can be a tiny hero.
Those bubbles can trigger a burp. And burping, as undignified as it sounds, is your body’s way of releasing trapped gas pressure. It’s like popping the top off a shaken soda bottle, but classier.
A small study even found that carbonated water improved digestion in people with chronic indigestion. It helped move food along faster and even reduced constipation. So for some, a fizzy sip is basically a gentle turbo boost for the tummy.
But Wait—The Downside of Bubbles
Here’s where it gets tricky. If your upset stomach comes with bloating or that “please, no more” gassy feeling, sparkling water might be your stomach’s frenemy. Swallowing carbon dioxide gas can add more air to an already air-filled balloon situation.
For people with IBS or acid reflux, the bubbles can actually trigger more pain. The carbonation can relax the lower esophageal sphincter (that’s the little muscle door between your stomach and throat), letting acid splash back up. Not fun.
One study published in Digestive Diseases and Sciences even found that people with reflux felt worse after carbonated drinks. So if your upset stomach feels like fire or sharp gas pains, skip the bubbles and reach for flat water.
