Usually you feel a sense of calmness whenever you take a puff of cigarette. But this action has the precise opposite outcome on the blood vessels that become immediately thinner and this leads to spasms.
This reduces the circulation of the blood and decreases the level of oxygen in the blood. According to the doctors, anything that reduces the level of oxygen in the blood is bound to take a toll on the skin.

Wrinkles – The decrease of the circulation and the reduced oxygen cause premature wrinkles and ageing. These are particularly pronounced around the mouth. Moreover, as you constantly purse your lips while smoking, it gives rise to cigarette lines that extend from the mouth. These are easy giveaways that someone is a smoker.
Poor Wound Healing – Apart from that, the poor circulation induced by smoking also gives way to poor wound healing. This is the most obvious short-term effect of smoking.
Ageing – The release of free radicals in the body is another direct result of smoking. This actually impairs the production of collagen and breaks down the proteins that maintain the skin. The process of natural ageing involves the formation of free radicals that leads to the oxidative impairment of the cells. A majority of the anti-ageing products are designed for removing these radicals.
When you smoke you actually aggravate the release of higher levels of free radicals that enhance the oxidative damage of the cells. This results in the ageing of the skin.link text