Hot...Hot...Chili

This is because chili contains a very tiny amount of hydrochloric acid (HCl) that is responsible for the burning sensation in your mouth. HCl is the second strongest acidic compound after sulfuric acid (H2SO4). The effect of hydrochloric acid heats your body system, consequently your body will produce sweat to cool it down.

The sweating effect of chili is very helpful to people living under high air humidity like Sichuan province in China. That's the reason why Sichuan foods use lots of chili. People there eat lots of chili because they want to sweat more, so they don't get humidity-related diseases due to a long-term exposure of wet condition.