Why does your tummy get upset every time there is an upcoming important event?
In: Biology
It’s called [the gut-brain axis](https://www.healthline.com/nutrition/gut-brain-connection) and it’s really cool. So, basically, the gut shares hundreds-of-millions of neurons and one of the largest nerves in the body (Vagus) with the brain. Signals can go both ways, so a disturbance in your stomach (say from bad food) can cause a neurological reaction, just as something like depression or anger can cause an upset stomach. It even happens in stressed out wild animals.
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