Will Resuming Smoking 4 Weeks After Open Rhinoplasty Affect the Final Result?

Thank you for the question. You should absolutely consult with your physician about your smoking habits in order to obtain the most reliable and individualized medical advice. Most specialists recommend abstaining from smoking for 2-3 weeks before a rhinoplasty, while others may insist on a full month or two. Smoking will cause irritation and restrict the blood flow to your healing areas, possibly causing complications during the recovery period.  
In addition, you should also make sure to avoid smoking for at least two weeks after surgery as it may interfere with your healing process. Smoking after surgery may restrict the flow of blood to the healing areas, exacerbate swelling, and prolong recovery. Of course, as a physician, I would advise you to quit smoking altogether due to a variety of health risks associated with it. 
 An in-person exam with a board-certified plastic surgeon would be the best way to assess your needs and obtain expert medical advice. Best of luck!

You are correct. Smoking is bad and this is ab excellent time to quit. I assume you stopped for your procedure.