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The issue with smoking has to do with the content of nicotine which has to do with all kinds of smoking including marijuana. When you smoke, your blood vessels go into spasm. When they're in spasm, you're not getting healing blood flow to the area that you need which is the area that's healing.

That's what the problem is. I require my patients not smoke at all of any kind two weeks before and two weeks after and hopefully never after.

The Rules of Smoking Before and After Surgery

Dr. Kevin Tehrani explains the rules of smoking before and after surgery. (Spoiler alert: Just don't do it!)