system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does carbonation aid with an upset stomach?
gpt
A lot of times nausea is caused by your stomach being very full, not necessarily just with food but also with air.  If you have a bit of soda it can make it easier to burp and release some of the gas in there which puts pressure on the top of your stomach and nerves that make you feel uncomfortably full and nauseous.  Release some of that air and there is less pressure and less nausea.