As with any surgery, there are some risks to a Brazilian butt lift surgery. A BBL is a minimally invasive procedure. There have been reports of fat embolism, which has similar symptoms as blood clots in the lungs.  The American Society of Plastic Surgery has set up an advisory panel to further study these incidents.  The ASPS has also established guidelines for fat transfer to the buttocks to help avoid these incidents. There are some aesthetic risks to the procedure, such as asymmetry or abnormalities in appearance of the butt.