Smoking can accelerate the normal aging process of your skin, contributing to wrinkles. Skin changes from smoking can be seen in young adults who have been smoking for as few as 10 years.
Smoking causes narrowing of the blood vessels in the outermost layers of skin. This decreases blood flow, depleting the skin of oxygen and nutrients, such as vitamin A, that are important to skin health. All of these factors increase damage to the elastic fibers (elastin) and collagen which give your skin strength and elasticity.
In addition, the repetitive facial expressions you make when smoking — such as pursing your lips when inhaling and squinting your eyes to keep out smoke — may contribute to wrinkles. It's also possible that repeated exposure to the heat from burning cigarettes may damage your facial skin over time.
--- Content from Mayo Clinic. Photo circulates in the Internet.