As we know most of the people leave smoking and they think that they are now secure. It is not true. If you smoked and now leave then maybe you can suffer from cancer and heart diseases. When people smoke they tagged in their lungs and bowel. It may be the reason of cancer. Doctors and scientist has found that smoking leaves tag in smoker DNA. If you were smoker and you want to know about your smoking addiction then you can get checkup to know about your smoking addiction history.
If you want to see the spot of smoking on your lungs and bowel then you can get knowledge through checkup and know about the future problem from smoking spots on your lungs and DNA. DNA smoking spot is also effective on child which may be problem for your child future. Due to DNA smoking spot and lungs smoking spot people can get cancer in their lungs or bowel or breast which is not easy to cure. Smoking is very dangerous for smoker and they know very well about harms of smoking after that due to smoking addiction they smoke continue and when they leave smoking they find spot of smoking in their lungs and DNA.
If you are newly smoker and you know from smoking harms then you should stop smoking before getting history in DNA. Smoking becomes genetic effects while smoker leaves smoking after some time. So just go away from smoking and live without risk life.