The nicotine in cigarettes impairs healing and impairs nasal clearance. The nose is highly vascular and usually heals despite factors like smoking. Therefore, being a smoker does not exclude you from having rhinoplasty or septoplasty and you will most likely heal as expected. However, you may prolong your healing period. Studies have shown septoplasty to be less effective in smokers because of the effect the cigarettes have to impede natural clearance of mucous in the nose. I would advise you to quit smoking if possible and to at least not smoke in the first 6 weeks. You should see your surgeon regularly to follow your post-op course.