While many of us would like to see a streamlined profile when we look in the mirror, some of us have excess fat that creates a double chin, also called submental fullness. A double chin can result from a variety of causes, including hereditary factors, weight, anatomy and airway positioning. If you have a double chin you’re unsatisfied with, you’re not alone — as many as 68 percent of people are in the same boat, according to the American Society for Dermatologic Surgery.