There are many benefits of quitting smoking, including improvement of bad breath, improvement of blood circulation and reduction of cough and phlegm symptoms. 1. Improvement of bad breath: Long-term smoking is prone to the phenomenon of bad breath, after quitting smoking, bad breath will be significantly improved. It also improves oral hygiene and sensitizes the sense of taste. 2. Improve blood circulation: long-term smoking can reduce the blood’s ability to absorb oxygen, easy to increase blood pressure, causing cardiovascular disease. After quitting smoking, the oxygen content in the blood gradually becomes normal, and the function of its own blood vessels will be improved, which can reduce the probability of cardiovascular diseases, and the probability of high blood pressure will also be significantly reduced. 3. Reduce coughing and phlegm: Long-term smoking is prone to coughing and phlegm symptoms, but also harm the respiratory tract. Quit smoking can enhance the ability of respiratory defense, so that breathing more smoothly, coughing, coughing symptoms will gradually improve. Smoking is harmful to health, by quitting smoking, can reduce the incidence of disease, so it is recommended to quit smoking as soon as possible, good for health.