Thank you for your question. Smoking is bad for you, it causes cancer, heart disease, strokes, etc. From a Plastic Surgery standpoint, we see the effects of smoking everyday in our clinics. Nicotine is a vasoconstrictor. When you use nicotine, it constrict the vessels. Oxygen and would healing cellular messengers can't get to the wound appropriately. Wound healing needs all of this to mend the wound the best it can. Wounds that are on tension are even more susceptible to falling apart and/or having poor scarring, (Facelift, Breast Lift, Tummy Tuck). Some Plastic Surgeons will not do these procedures on those who smoke. Best to quit smoking around the time of surgery, hopefully you won't find the need to pick up the habit again. If you quit, then you don't have to worry about the test. Please speak with your Board Certified Plastic Surgeon, as each one may have a different protocol. Jeffrey J. Roth, M.D. F.A.C.S. Board Certified Plastic Surgeon Las Vegas Plastic Surgery