system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come when you get in trouble, you feel a pain in your throat or stomach?

Random memory I had of when I was younger and my dad caught me in a lie. He already knew the truth and when he told me he knew I was lying, I felt a sudden pain in my throat and my gut, why?
gpt
Our body only has one stress response regardless if the stress is from a large animal chasing us, heartbreak, worrying about the future, or being caught in a lie. This response is also known as the fight or flight response.

The response redirects blood from less essential functions (example digestion) to our muscles and brain and tenses your muscles. These functions are preparing the body to physically fight or flee. The tightening in your throat is from both increased blood flow and the tensing of the muscles there.

The feeling in your stomach is from lowered blood to your digestive system, making it feel like it's a lump or weight.

Fight and flight were good options for our hunter/gatherer ancestors to address stress but does not work well for our modern world. Fighting your way out of problems tends to get you in jail while running away doesn't make the problem go away. Since it's only been a few tens of thousand of years since our hunter/gather days (a tiny bit of time in terms of evolution), we're still stuck with the same bodily responses as our ancestors.