Good going , if you never ever smoke again , then it's the best think , The risk factor for many diseases are ended

Damages don't revert back

Once any damage takes place in lungs r having permanent lesion

Hello Sir , Once you start smoking and you smoke on a continuous basis , there is a certain amount of lung damage which will never be same like a non smoker lung . But it is an excellent step to stop smoking and it requires a lot of courage to do so . And ceasing smoking prevents the lung from further damage and at the same time it saves you from cardiovascular diseases as well . But we can never be very sure that the amount of smoking has cause a lung damage but it all depends on the quantity . But again Keep up this good effort . All the best sir