There are wrinkles in some ways expected to hit the face. Granted, the whole body gets wrinkled after a while. But the major area that we concentrate on is always the face. This being said, smoking is obviously known to lead to greater wrinkles, because quite frankly, it constricts the blood vessels, there’s the mouth motions that go with it, and all in all, it’s not really a good thing. This being said, when it narrows the blood vessels, just because it’s closer to the face does not mean that it is only causing wrinkles on the face. For one thing, it’s also rather close to the hands for obvious reasons. But this being said, it also damages the collagen and elastin, and a study as of 2007 showed that it increased wrinkles on the inner arms, as well as other parts, even spreading down to the legs. So smoking ultimately restricts blood vessels everywhere and that’s part of why it puts you at higher risk for certain heart problems and otherwise. It’s definitely not just the face. That being said, it is second only to sun exposure in terms of the damage it causes and the prevalence in general.