Comparing before and after one year of smoking cessation, there is a reduction of various discomfort symptoms and a lower risk of many diseases. 1. Reduced discomfort: symptoms such as coughing and nasal congestion gradually decrease or even return to normal, lung function gradually recovers, energy is more energetic, and the risk of infection decreases. 2. Reduced risk of cardiovascular and cerebrovascular diseases: data show that after 1 year of smoking cessation, the risk of stroke, heart disease and other diseases is reduced, the risk of stroke after 5 years is the same as that of non-smokers, and the risk of heart disease after 15 years is the same as that of non-smokers. Smoking not only jeopardizes your health, but secondhand smoke can also be very harmful to those around you, so it is important to quit smoking for your own sake and for the sake of your family.