Changes after quitting smoking for eight months include changes in the respiratory system, changes in mental state, and other changes. 1. Changes in the respiratory system: After quitting smoking for eight months, the cilia function of the lungs will be restored, the lung function will be improved, symptoms such as coughing and phlegm will disappear, and breathing will become brisk. 2. Changes in mental state: Long-term smokers will experience withdrawal symptoms such as fatigue, anxiety and depression after quitting smoking, but these symptoms will gradually improve after eight months of quitting smoking, and the mental state will gradually improve. 3. Other changes: the resistance of long-term smokers will be relatively low, the body’s immunity will gradually improve after quitting smoking for eight months, the probability of disease will be reduced. Long-term smokers will have yellow teeth and a lingering smell of tobacco, and after eight months of quitting, the color of their teeth will gradually return and the smell of tobacco will gradually dissipate. Smoking is harmful to your health, so please quit smoking.