The most fundamental solution to bad breath from smoking is to quit smoking in time. Because smoking is not only harmful to the body, it also has a certain stimulating effect on the lining of the oral mucosa, which can easily cause oral cancer, and it is also harmful to the tongue, which can easily cause a variety of white spots, or precancerous lesions. Moreover, smoking aggravates periodontitis, so bad breath often occurs. If you are unable to quit smoking, you should rinse your mouth after smoking and use water to remove as much tobacco stains as possible from your mouth, and you should have regular scaling or periodontal treatment to clean the tobacco stains and calculus attached to the surface of your teeth. Smoking will make the surface of the teeth become very rough, very easy to accumulate food debris, resulting in tooth decay or periodontitis.