Ice cream headaches
When you stick something extremely cold in your mouth and eat it quickly such as drinking an ice cold beverage or eating ice cream rapidly, it quickly cools the palate of your mouth. Why this is significant is that there is a nerve centre located just above the back of the roof of your mouth. This nerve centre includes nerve clusters that send signals to the brain about changes in body temperature. When these nerve clusters are rapidly cooled by what you are consuming, they are over stimulated and send the message to the brain that the body just lost a severe amount of heat. This ends up resulting in the rapid contraction of blood vessels in your head. Shortly thereafter, the temperature at the palate of your mouth goes back to normal and the nerve centres signal everything is fine and the blood vessels end up rapidly dilating. This all happens in a matter of few seconds, but the end result of this rapid contraction and dilation of blood vessels is an extreme, sharp pain, often in your temples, forehead or sometimes even your face itself and is referred to as 'ice cream headaches' or 'brain freezes'
