A double chin, medically referred to as submental fat or submental fullness, is characterized by the presence of an extra layer of fat beneath the chin. It manifests as a noticeable bulge or sagging skin in the area between the chin and the neck. The appearance of a double chin can vary from person to person, but it’s generally recognized as a soft, excess tissue that creates a fold or crease beneath the chin, often resembling the shape of a “double.” The presence of a double chin can have a significant impact on facial profile and aesthetics, affecting facial symmetry, perceptions of youth, and self-esteem.