constant smell of cigarette smoke in nose If you constantly things that nobody around you seems to be able to smell, you may have phantosmia -- a smell disorder that has been linked to COVID-19 and other infections Phantosmia: Smelling Smoke? | Phantom
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However, it is also possible that smoking is not merely a marker for psychiatric disorders, but rather directly increases the risk for such disorders, which in turn increases the risk for suicide. Grucza said that the imposition of anti-smoking rules presented the researchers with a naturally occurring experiment

After smoking, people would crush the remaining part with their shoes and move on

This works well since soda bottles are made to the right size for this purpose

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When a smoker puffs on a cigarette, nicotine is carried into the lungs via smoke particles where it is absorbed into blood and makes its way quickly to the brain
