Smoking not only affects the inside of your body, but affects the way you look because it can age your appearance. Smoking affects your skin in the form of wrinkles. It uses up vitamin C that is needed for healthy skin. Lines, wrinkles, sunken cheeks, and a slightly pigmented appearance are results to your skin caused by smoking. Smoking can ruin teeth, discolor them, and make your smile not as attractive as well as cause gum disease. Fingernails can be affected by smoking with discoloration.