the complications of the Brazilian butt lift include:

1) fat embolism, injection of fat into the bloodstream and causes inflammation the lungs

2) pulmonary embolism and deep vein thrombosis, this is a complication associated with all types of surgery and any immobilization  ( Serena Williams had this after plane flight)

3) infection, when the fat injection the buttocks in the best case scenario 70% of the fat lives and 30% dies. 30% of the fat is a good source of food for bacteria.

4) fluid shifts and lidocaine toxicity, complications of liposuction

5) complications of anesthesia