The really evil stuff burn all the way down, and burns all the way out in a few hours.
If it feels too hot, shouldn't swallow it. Now I like a little hot and I also like spicy that isn't hot but hot hot hot, no way.
I have noticed that a little spicy hot helps with my gingivitis which makes my gums, mouth and tongue sore. Also some special toothpaste. Also warm salt water.
Ruy that is interesting about the c rations; you must have served in Nam or just before or after. So the hot stuff might well have medicinal value if you can tolerate it or administer it another way.