Bile is your body’s built-in Pac-Man. It’s a digestive fluid made by your liver and stored in your gallbladder. Its job? Break down fats like a tiny, angry soap.
When you throw up water, your stomach empties fast. Then, your body says, “Hold my beer,” and squeezes bile upward. That’s the yellow you see—pure, unfiltered liver juice.
Fun fact: Bile is actually greenish-yellow. It looks yellow in the toilet because of the water mixing in. You’re basically creating a science experiment with your own guts.
Why after drinking water, though?
Here’s the kicker: water is a trigger. When you sip water on an empty stomach, your stomach might get offended. It contracts, goes “Nope,” and sends bile flying.
This is common if you’re hungover. Alcohol irritates your stomach lining, so water just becomes a launchpad for yellow bile. You’re not alone—millions of brunch survivors know this pain.
Another sneaky reason: acid reflux. Water can dilute stomach acid, which sometimes makes things slosh backward. Bile follows like a grumpy hitchhiker.
