The color of puke differs on what you ate. I have seen it white, brown, green, and orange and also yellow.
If vomit is yellow it is either because of something you just ate that is yellow or its bile. Just on the other side of your lower stomach sphincter there is a bile duct that's by your liver. Its in...
The only way to find out for sure is to visit your doctor.
It means that you don't have anything in your stomach but stomach bile.
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