system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can we "train" our bodies/tastebuds to handle spicy foods? Is it just getting used to the heat or are there actual chemical changes?
gpt
You can train your body.  More importantly your brain.  Your body creates chemicals to battle the pain.  It is why heat heads get a high from trying really hot foods.  

Endorphins and other brain goos in the brain are discharged more effectively if you eat spicy food more often.  

If you have problems with spicy foods start off with small changes.  Overtime you'll find it much easier to kick up the spicy.