Ice cream is a frozen dessert made from dairy products like milk and cream, and often combined with fruits or flavors. It contains sugar and sometimes artificial flavors and colors. Eating very cold ice cream can cause a brief headache known as a "brain freeze" due to rapid swelling of blood vessels in the roof of the mouth. The history of ice cream dates back thousands of years to ancient civilizations using snow and ice to make cold treats, with modern ice cream gaining popularity due to innovations from Arab and European cultures. Frozen desserts are a generic term for frozen foods made from flavored water, fruit purees, milk/cream, custard, or mousse.