Decayed skin on the face is one of the main visible signs of aging in men and women. The face loses its roundness and the jaw begins to fall, producing a double chin in many people. Submaxillary firm and young are replaced by soft and irregular skin on the face. A resource provided by the American Academy of Dermatology states that intrinsic aging, or genetic factors and extrinsic aging or environmental factors are the main causes of jowls.
Genetics, an intrinsic factor, causes double chins in many people. You can find out your predisposition to have a double chin by looking at your family tree. If the older members of your family have developed double chins, you will probably see the appearance of cheeks as you get older. Werner's syndrome, another rare hereditary disorder, makes patients appear elderly at 30 years of age. The International Registry of Werner Syndrome says that in addition to developing the double chin, people with this condition usually die at 40 or 50 years. Except for Werner's syndrome, extrinsic aging plays more of a role in causing jowls than genetics.
Gravity, the force that keeps things planted on Earth, also affects the aging of the body. Changes in the body of aging make the skin more susceptible to warping. As the body loses elasticity, gravity causes the jowls and other areas of the face to decay, especially when people approach 50 years of age.
A source at the American Academy of Dermatology says that spending a few minutes in the sun causes a double chin because of the damage to the layers of the skin. The skin looks leathery and does not maintain elasticity. As the skin loses elasticity, the double chin begins to fall. Prolonged exposure to the skin continues to break down collagen, so using sunscreen and protective head covers reduces chin formation.
A source at the American Academy of Dermatology says smoking causes a double chin, even in people as young as 20. People who smoke more than 10 cigarettes a day for at least 10 years develop jowls faster than non-smokers. The American Academy of Dermatology cites a 2002 study in which 20-year-old smokers were microscopically analyzed for their skin. Many of the smokers already showed signs that their skin had lost some of its elasticity.
You may consider not sleeping in the same position every night as a cause of double chin. However, sleeping on your sides affects the skin of the chin and cheeks. The American Academy of Dermatology says that people who sleep on their backs have less flaccid dewlap than people who sleep with their faces against a pillow.