system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why queasy when hungry?

It just seems really counterproductive to be queasy when you need to eat.
gpt
Basically, your stomach was expecting food and prepared for it by making extra stomach acid. Without food to dissolve, the extra acid started irritating your stomach lining causing the queasiness. 

When you push through the queasiness and eat, it goes away quickly because the acid is now dissolving food like it is supposed to. 

It will also eventually go away on its own as your body absorbs the acid.