As we age, our jawlines tend to soften, and the skin loses elasticity and collagen. Collagen and elastin are the proteins responsible for the firmness and elasticity of the skin. With the loss of elasticity, it can lead to sagging and droopiness. The skin that sags under the chin and neck area are known as jowls. When the production of these vital proteins slows down, the skin becomes looser and loses its firmness. Combine that with gravity, drooping in the jawline and beneath the chin can occur. Jowls tend to develop due to genes, environmental factors (smoking and sun exposure), and lifestyle choices (weight loss).