When you drink carbonated water that gas can get stuck in your belly. This does cause bloat in some people. It also may make you feel fuller.

Does Perrier water cause bloating?

If you drink a lot of sparkling water you might find you feel bloated, but researchers in Japan have found that this side-effect could be put to good use.

Does Perrier cause stomach problems?

While it won't cause IBS, carbonated water may cause bloating and gas, which can lead to IBS flare-ups if you are sensitive to carbonated beverages. The bottom line: if you have stomach issues and experience flare-ups after drinking carbonated water, you may be better off eliminating them.