Capsaicin is the culprit responsible for the burn in your mouth when you eat spicy foods like jalapenos. The amount of capsaicin in jalapenos is measured in Scoville heat units, named after the pharmacist, Wilbur Scoville, who developed the method for accurately measuring heat in different types of chilies. Though many other peppers are hotter, the jalapeno contains enough capsaicin to cause a burning sensation that is painful for some people and pleasurable for others.
Drink milk. Milk products' protein traps the jalapeno's volatile oils and washes them out of your mouth, according to the North Dakota State University Agriculture Communication website.
Eat yogurt or ice cream. For the best effect, allow these treats to linger in your mouth for a few seconds before swallowing.
Chew a spoonful of sugar.