system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does my mouth literally feel like it's on fire after I eat something really hot?
gpt
There are no tastebuds on your tongue for spicy foods unlike sweet or salty. Spicy is the reaction of nerves in your mouth to capsaicin which makes stuff spicy. The nerves in your mouth are there to react to heat, knowing when stuff is too hot to eat. These nerves react to capsaicin in the same way. Basicly these nerves send out the information that the food in your mouth is too hot to eat when eating capsaicin. That is why it actually feels really hot in your mouth.