Sir. Based on the history you have given, you should know that alcohol can cause gastritis, ulcers, obesity, elevated liver enzymes, affect other organs like pancreas, kidney etc and again smoking also affects most of the organs in the body. Since you have mentioned that you are a smoker, generally the toxic contents in a cigarette affect the lung tissues on chronic usage resulting in breathlessness, recurrent lung infections etc. Keeping check of this habits and maintaining a healthy diet with regular physical activity itself acts as a preventive measure. Since this things have already caused damage, kindly consult a physician for further management.