Is liquid BBL safe? It carries real risks. The FDA recommends against using dermal fillers or any injectable filler to increase the size of the buttocks, and no filler is FDA approved for that use. Reported risks range from bruising, swelling and lumps to rare but serious complications such as blocked blood vessels and tissue death.
Written by Jen Adams, BSN, RN
Medically reviewed by Dr. Josh Allen, D.O., Medical Director, October 23, 2026
Medical disclaimer: This article is for education only and does not replace medical advice. Using filler in the buttocks is an off-label use. If you have shortness of breath, chest pain, vision changes, or skin turning white, gray, or blue after a filler injection, seek emergency care.
A liquid BBL, short for liquid Brazilian butt lift, uses injectable filler to add shape and some volume to the buttocks and hips. Unlike a surgical BBL, it involves no liposuction and no fat transfer.
At InjectCo, a liquid BBL uses hyperdilute Radiesse, an injectable made of calcium hydroxylapatite microspheres in a gel carrier. It is placed in thin, even layers under the skin. Results are visible right away and keep building over about 6 months as your body makes new collagen around the product. Other clinics may use other fillers, so always ask which product your provider plans to use and what it is approved for.
Your nurse injector recommends the plan and the number of sessions after assessing your anatomy and goals.
No. Radiesse is FDA approved for facial wrinkles and folds, facial fat loss in people with HIV, the back of the hands and, diluted, wrinkles on the décolleté. It is not approved for the buttocks or hips, so a liquid BBL is an off-label use. The FDA recommends against using dermal fillers or any injectable filler to increase the size of the buttocks, and says these uses are not approved. Off-label use is legal, and it means the FDA has not reviewed the product for this area. We tell you this before any plan is made.
The FDA’s dermal fillers page puts it this way:
“The FDA recommends against using dermal fillers or any injectable filler for body contouring and enhancement to: … Increase size of the buttocks”
The FDA also notes that the risks of using fillers in unapproved areas are not known.
Medically reviewed by Dr. Josh Allen, D.O., Medical Director, October 23, 2026
The FDA groups dermal filler risks by how often they’re reported.
| How often | Reported risks |
|---|---|
| Common | Bruising, redness, swelling, pain, tenderness, itching, rash |
| Less common | Lumps or nodules under the skin, infection, open or draining wounds, allergic reaction, tissue death (necrosis) |
| Rare | Severe allergic reaction, filler migration, permanent hard nodules, injury to the blood supply leading to tissue death, vision loss, or stroke, and death |
For Radiesse, common reactions are pain, bruising, redness, swelling and some firmness where the product was placed, and they are usually short-lived. Lumps or nodules, an uneven contour, skin discoloration and infection can also occur.
The most serious risk is filler entering a blood vessel. The FDA calls unintended injection into a blood vessel the most concerning risk of dermal fillers. The chance is low, but the result can be blocked blood flow and lasting damage.
Two more points are specific to Radiesse. It cannot be dissolved with hyaluronidase, the enzyme used to break down hyaluronic acid filler. And its particles show up on CT scans and may show on standard X-rays, so tell your doctors and radiologists that you have had it.
The evidence for the buttocks specifically is limited. A 2026 global expert consensus on calcium hydroxylapatite for buttock augmentation reported that side effects in published studies were generally mild and short-lived, with no severe events reported, while noting that the available datasets are still small. An analysis of FDA adverse event reports from 1993 to 2014 found 3,782 filler complications across all treatment areas, 15 percent of them involving calcium hydroxylapatite fillers.
Many side effects appear shortly after injection and settle within days to weeks. The FDA also notes that some can appear weeks, months, or years later. Following your liquid BBL aftercare plan helps you spot problems early. At InjectCo that plan includes avoiding strenuous exercise for 24 hours, keeping strong sun and heat off the area for about 24 hours, and massaging the area for 5 to 10 minutes after a warm shower for 5 days.
Call 911 or go to the nearest emergency room if you have shortness of breath, chest pain, or signs of a stroke, such as sudden difficulty speaking, face drooping, or weakness or numbness in your face, arms, or legs.
Seek immediate medical attention if you notice any of the following during or after treatment, which the FDA lists as signs of a filler entering a blood vessel:
Contact your injector promptly about increasing redness, warmth, or swelling, drainage from an injection site, fever, or new lumps.
A liquid BBL suits people who want better shape rather than a big change in size, and who would rather not take time off for surgery.
It is not the right choice, or it needs to wait, if you:
Tell your nurse first if you take aspirin, warfarin or another medicine that thins the blood, have an autoimmune or granulomatous condition, tend to form keloid or raised scars, or plan laser or a peel on the same area. Radiesse has not been studied in these groups, so your nurse and the medical director decide case by case.
Medically reviewed by Dr. Josh Allen, D.O., Medical Director, October 23, 2026
Surgical BBL removes fat with liposuction and grafts it into the buttocks. Its most serious known risk is fat entering large veins and traveling to the lungs (pulmonary fat embolism).
The ASERF Task Force report, published in Aesthetic Surgery Journal in 2017, surveyed 692 surgeons who reported 198,857 gluteal fat grafting cases. They reported 32 deaths from pulmonary fat embolism and 103 nonfatal fat embolisms, a career mortality rate of 1 in 6,214. Surgeons who injected fat into deep muscle had a significantly higher rate of these events. The report concluded that gluteal fat grafting appears to carry higher mortality than any other aesthetic surgical procedure.
| Liquid BBL | Surgical BBL | |
|---|---|---|
| What it involves | Filler injections, no incisions | Liposuction plus fat grafting under anesthesia |
| FDA position | FDA recommends against filler to increase buttock size | A surgical procedure, not an FDA-approved device use |
| Most serious reported risk | Filler entering a blood vessel, leading to tissue death, vision loss, or stroke (FDA) | Pulmonary fat embolism (ASERF) |
| Mortality data | No large mortality studies found for buttock filler | 32 deaths among 198,857 reported cases (ASERF, 2017) |
| Can it be reversed? | Radiesse cannot be dissolved with hyaluronidase | No |
The lack of mortality data for liquid BBL doesn’t mean the risk is zero; it means it hasn’t been measured in large studies. For a fuller comparison of the two procedures, see our guide to BBL vs non-surgical BBL.
Review risks with a nurse injector first.
Liquid BBL from $5,999.
Results are visible right away and keep building over about 6 months. Published studies show results lasting up to about 2 years; many of our patients keep their results 2 to 4 years, depending on metabolism and lifestyle.
A liquid BBL at InjectCo is from $5,999, and your nurse confirms your plan and total at your consultation. Financing options are available. For a full breakdown, see what a liquid BBL costs.
The FDA recommends against using any injectable filler to increase the size of the buttocks, and the evidence for buttock filler comes from small studies. Reported risks range from bruising and swelling to rare but serious complications, including blocked blood vessels and tissue death. Discuss these risks with a licensed provider before deciding.
No. No filler is FDA approved for buttock augmentation, and the FDA recommends against using dermal fillers or any injectable filler to increase the size of the buttocks. Using Radiesse in the buttocks or hips is an off-label use.
Common side effects include pain, bruising, redness, swelling and some firmness. Less common risks include lumps, an uneven contour, skin discoloration and infection. Rare risks include injury to the blood supply.
Filler can block a blood vessel if it’s injected into one, which can lead to tissue death, vision loss, or stroke. The FDA describes this as rare but the most concerning filler risk. Fat embolism, which travels to the lungs, is the main fatal risk of surgical BBL, not liquid BBL.
People with a bleeding disorder, severe allergies or an allergy to any ingredient in Radiesse or to lidocaine, an infection near the area, or who are pregnant, breastfeeding or still losing a lot of weight should not have it, or should wait.
Expect some discomfort during the injections and soreness afterward. Pain, bruising and swelling are common reactions and are usually short-lived. Ask your injector how they manage discomfort during treatment.
Published studies show results lasting up to about 2 years; many of our patients keep their results 2 to 4 years, depending on metabolism and lifestyle.
The FDA recommends against using injectable filler to enlarge the buttocks. The published evidence is limited, and serious complications, though rare, can be lasting. Surgical BBL carries its own documented risk of fatal fat embolism.
If you’re considering a liquid BBL, ask your provider which product they’ll use, what its approved uses are, how they handle complications, and whether you’re a candidate given your health history.
Ask every question before you decide.
Liquid BBL from $5,999.
Dr. Allen earned his Doctor of Osteopathic Medicine at Lake Erie College of Osteopathic Medicine and completed his emergency medicine residency with Texas A&M. As Medical Director, he reviews InjectCo’s treatments, protocols, and patient education content for accuracy and safety across all nine Texas locations.
