Hi Carebear, I'm sad to hear the above two comments that damage can't be recovered! Our bodies are an incredible machine and can heal ourselves incredibly. I started smoking when i was 15, smoked 20 a day, and quit 4 months ago, I am now 37.
Everyday now i can feel my lungs healing and what's more is, you know you feel that need to smoke, after a few months, your lungs feel so good, it's as good as smoking a cigarette everytime you breathe!
Not only that, the black rings under my eyes are gone, my skin is plumper, it's colour is not grey anymore, mentally i feel much stronger, my heart feels like it is pumping normally now.
Everything heals after you quit smoking - it is never too late, and just wait till you realise how amazing you feel once you have quit, you really will wonder why you thought it was so hard to quit!