The risks of a tummy tuck or abdominoplasty, as with any surgery, include a (low) risk of post-operative infection, bleeding, and swelling. There can be an increased risk of complications if you have diabetes or poor circulation, if you smoke, or if you have heart, lung, or liver disease.
Risks that are specific include general risks related to anaesthesia, as well as loss of skin, fluid accumulation, wound separation, blood clotting, numbness, scarring, and asymmetry.