hello doc,
i had water in my right lung a year back...n i've taken the medicine for 3 months and it was gone also they have removed water from my lung. but now my left back is paining..and i'm worried wether i'm again infected. and i smoke once a day is it harmful
If you feel concerned you should visit a doctor, as the back pain might be connected or not to your lung condition. This can only be determined after an x-ray.
Smoking is bad for health in a completely healthy person, however in your case it may proven to be even worse. You should also talk to your doctor about it.
Regards, John.