A double chin is caused by an extra layer of fat that develops beneath the chin. A few different factors combine in the body to create a double chin. Understanding these factors may help with understanding ways to get rid of the double chin itself. Having a double, or even a triple chin, is a common condition. Usually, it’s nothing to worry about and is nothing more than a layer of fat that has formed under the chin. When that layer becomes substantial enough, it forms a wrinkle that creates the appearance of one or more extra chins.