Smoking has no harm to teeth, but the main problem lies in the aesthetic problems of teeth and the damage to periodontal tissue, which is also known as gums. People who smoke for a long time have worse periodontal health than those who don't smoke, and are more likely to have gingival atrophy and alveolar bone absorption, leading to root exposure, loosening and eventually falling off. Smokers are more prone to these problems than non-smokers, but so far, I have seen more patients with periodontal problems, but smokers have significantly less dental caries than non-smokers (no research shows the correctness of this phenomenon, for reference only), but the probability of smoking causing other oral diseases is much higher than that of non-smokers, so it is recommended to smoke as little as possible or not. It is ok to take appropriate measures when business and social problems need it, but don't overdo it.