My age is 20 i`m smoke 7-10 cigarette in day nothing problem in my lungs chest throat and I am start smoking since 3 year so you tell me I am fit what can I do.

Question

You just need to quit smoking because it is harmful even when you smoke one cigarette. Just because you do not have a problem as yet, it does not mean that smoking is alright. You are obviously functioning on a reactive mode i.e. you will stop only when you have a problem. At that time it will become too late and you may have a permanent problem and will be stuck with it for the rest of your life. Be proactive: anyway, if something is not good for you why do it in the first place? Just quit is my best advice​.

Saul Pereira · Accepted Answer

You just need to quit smoking because it is harmful even when you smoke one cigarette. Just because you do not have a problem as yet, it does not mean that smoking is alright. You are obviously functioning on a reactive mode i.e. you will stop only when you have a problem. At that time it will become too late and you may have a permanent problem and will be stuck with it for the rest of your life. Be proactive: anyway, if something is not good for you why do it in the first place? Just quit is my best advice​.