dreaming about smoking cigarettes after quitting What to Do If You're Craving Cigarettes After Quitting Lungs have real self-repair mechanisms,

But unless nicotine is pretty much eliminated quickly and comprehensively in all available tobacco products which seems unlikely it runs a serious risk of making things worse as smokers smoke cigarettes harder in order to get the nicotine they need, leading to more exposure to the harmful tar. Linda Bauld, deputy director of the UK Centre for Tobacco and Alcohol Studies and professor of health policy at the University of Stirling agreed that the move could end up exposing smokers to higher levels of toxins

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Dr Yvette van der Eijk, an assistant professor at the National University of Singapore who specialises in tobacco control and mental health research, said that if Singapore wants to be smoke-free, it could adopt more aggressive measures, such as reducing nicotine content in cigarettes, in the next five years

The Health Consequences of Involuntary Exposure to Tobacco Smoke: A Report of the Surgeon General