A Brazilian Butt Lift, commonly called a BBL, is a cosmetic procedure that uses your own body fat to add volume and shape to your buttocks. Unlike implants, it works by taking fat from areas where you don’t want it (stomach, hips, back, or thighs) and injecting it into the buttocks. It’s one of the fastest-growing cosmetic surgeries in the world, but it also carries specific risks that set it apart from other procedures.
How a BBL Works
The procedure has two stages performed under general anesthesia. First, your surgeon uses liposuction to harvest fat from donor sites on your body, most commonly the abdomen, flanks, back, or thighs. The harvested fat is then processed and purified, typically by centrifuging it to separate viable fat cells from blood, oil, and damaged tissue.
In the second stage, the purified fat is injected in small amounts into different areas of the buttocks to create the desired shape and volume. Current safety standards, backed by the American Society of Plastic Surgeons, require that fat be injected only into the subcutaneous space, which is the layer just beneath the skin and above the muscle. Many governing bodies now mandate the use of real-time ultrasound imaging during injection to confirm the surgeon stays in this safe layer. Injecting fat too deep, into or below the gluteal muscle, is what historically caused fatal complications.
Who Is a Good Candidate
Because the procedure relies on your own fat, you need enough of it to harvest. Most board-certified plastic surgeons recommend a BMI between 23 and 30 as the optimal range. If you’re too lean, there simply isn’t enough donor fat to produce meaningful results. If your BMI is significantly above 30, surgical risks increase. You also need to be in good overall health, as smoking, diabetes, and immune system problems all raise infection risk.
How Much Fat Survives
Not all of the transferred fat will take. Your body reabsorbs a portion of it in the months following surgery, which is why your results will look larger initially and then settle. Fat graft survival rates vary widely, with studies reporting anywhere from 50% to 75% long-term retention depending on the surgeon’s technique, how the fat was processed, and how well you follow recovery instructions. Your surgeon will typically overfill slightly to account for this expected loss.
The fat cells that do survive and establish a blood supply become permanent. Final results usually aren’t visible until 6 to 12 months after surgery, once swelling has fully resolved and the retained fat has stabilized.
The Recovery Timeline
Recovery from a BBL is more restrictive than many cosmetic procedures, primarily because of the no-sitting rule. Direct pressure on the buttocks can compress newly transferred fat, cut off blood supply to the grafts, and significantly reduce how much fat survives. Here’s what the recovery generally looks like:
- Week 1: No sitting or lying on your back at all. You’ll need a caregiver for daily tasks. Compression garments are worn continuously to reduce swelling at the liposuction sites. Pain and swelling are at their peak. Sleep on your stomach or side.
- Weeks 2 to 3: You’ll feel noticeably better and can start gentle walking. Modified sitting is allowed for short periods using a BBL pillow, a specially designed cushion that shifts your weight onto the backs of your thighs and keeps pressure off the buttocks.
- Weeks 3 to 4: Most pain and discomfort have subsided. Light activity, household chores, errands, and returning to work are generally possible. Heavy lifting and intense exercise are still off limits. The liposuctioned areas start to look smoother.
- Weeks 6 to 8: Normal sitting can gradually resume. You can begin returning to regular exercise. Your butt’s shape is becoming more defined, though it will continue to change.
- Months 3 to 12: Final results take shape as remaining swelling resolves and surviving fat cells stabilize.
Risks and Complications
BBL has a reputation as one of the higher-risk cosmetic procedures, largely because of its historical mortality rate. A 2016 survey by the Aesthetic Surgery Education and Research Foundation estimated the death rate at somewhere between 1 in 2,351 and 1 in 6,241 cases, making it the deadliest elective cosmetic surgery at the time. By 2019, after widespread adoption of subcutaneous-only injection techniques and ultrasound guidance, that rate dropped to roughly 1 in 14,921.
The primary cause of BBL deaths is fat embolism, where injected fat enters large blood vessels in the gluteal region and travels to the lungs. When a large clump of fat reaches the lungs (a macrofat embolism), it is almost always fatal. Smaller fat emboli carry a mortality rate in the 10% to 30% range. This is precisely why the injection depth matters so much and why safety guidelines have become stricter.
Non-fatal complications include infection, with surgical site infection rates for fat transfer to the buttocks reported between 2% and 13% depending on the surgeon’s protocols. Seromas (fluid collections under the skin), asymmetry, contour irregularities at the liposuction sites, and skin necrosis are also possible. Risk factors that increase your chance of complications include higher BMI, smoking, diabetes, and any condition that weakens the immune system.
What It Costs
The average surgeon’s fee alone for a BBL is around $4,800, based on figures from the American Society of Plastic Surgeons. But that number is misleading because it doesn’t include facility fees, anesthesia, prescription medications, compression garments, a BBL pillow, or follow-up care like lymphatic massage. The total cost typically lands between $6,000 and $18,000 depending on your geographic location, the surgeon’s experience, and whether the procedure is performed in a hospital or a freestanding clinic.
One estimate puts the cost of a safe BBL with a board-certified plastic surgeon at $12,000 to $18,000 in most parts of the U.S. Lower-priced options, especially those offered abroad or by non-board-certified providers, often come with significantly higher complication rates. BBLs are considered elective cosmetic surgery and are not covered by insurance.
Choosing a Surgeon Safely
The single most important factor in BBL safety is your surgeon. Look for board certification in plastic surgery specifically, not just “cosmetic surgery,” which has less rigorous training requirements. Ask whether they use ultrasound guidance during fat injection, as this is now considered standard practice by major plastic surgery organizations. Ask about their complication rate, how many BBLs they perform annually, and whether the procedure is done in an accredited surgical facility.
Avoid choosing a surgeon based on price alone. The wide cost range for BBLs reflects real differences in safety protocols, operating room standards, and surgeon training. Facilities that cut corners on anesthesia staffing, imaging equipment, or post-operative monitoring are where the most serious complications tend to occur.