Hello! Thank you for your question! It depends on which test that is done - urine or blood. Regardless, I would be honest with your surgeon, as the potential issues could be harmful, not to mention a loss of trust. The issue with nicotine is that it also acts as a vasoconstrictor, clamping down of blood vessels. Blood supply is always of great concern during any surgical procedure.. Since the vascularity to the area is already tenuous with the dissection of the abdominal tissue as well as around the belly button, maximizing blood flow to the tissue is critical. Typically, we recommend at least 6 weeks of smoking cessation prior to and at least 6 weeks after any surgical procedure. The longer, the better. Nicotine always increases the risk for infection, skin flap necrosis, and wound complications, as well as other health consequences. There is an increase pulmonary risk with the anesthesia and postop lung infections. The most devastating consequence of infection, especially since the tissue is tightened, is increased. This along with wound healing and scarring. I would discuss this with your surgeon prior to your procedure. Hope that this helps! Best wishes!