While many of us wish to have a slimmer profile when we look in the mirror, some of us have excess fat under our chins, also known as submental fullness. The excess roll of fatty flesh under a person’s jawline or chin is known as a double chin. When the fat is loose and hanging, it is sometimes referred to as the neck wattle. A double chin is not an indication of ageing because it can occur at any age. In your profile view of the face, you may clearly spot one. Age, genes, or even stress, which aids in weight gain, could all be factors in the development of a double chin.