Although we would like all of our patients to refrain from smoking for a month or so before surgery and a month or so after, there are some procedures where it really is critical. These include facelifts, tummy tucks, and fat injections. The survival of that fat is very precarious in the first few weeks after surgery, requiring the body's blood supply to nourish the delicate fat cells. Even smoking one cigarette (or breathing second hand smoke) can cause a measurable decrease in capillary bloodflow. Stop smoking immediately, hopefully you'll get lucky with little or no damage done.