General anesthetic is used, so all risks associated with being put to sleep apply. The most common side effects are uneven cheeks and removal of more fat than was necessary. However, those are the easy-to-live-with side effects.
There are many features that make the Brazilian Butt Lift different, and that’s where the real risks come in. As opposed to just having fat removed, fat is reinjected into the body. This causes a risk of fat embolism, a situation where fat is improperly placed and ends up in a blood vessel. Through the blood vessel, fat can travel to the lungs and cause death.
Septic shock and infection are concerns. In the case of model Andressa Urach, complications from thigh injections caused her legs to start rotting. A septic shock infection almost took her life. The experience was so scary that she has vowed to stop having plastic surgery altogether.