If you have been smoking for a while now you must have observed a few changes on your face. The darkening of lips appearance of wrinkles staining of teeth the smokers pout etc. But do you know what causes these changes? With every cigarette you smoke the tar gets stuck to your lips staining and discolouring them and the heat only worsens it. All the sucking and puffing also gives you a lot of wrinkles around the mouth and also a smoker's pout that is least attractive. Here are 25 things that happen inside your body when you smoke. Will