Facial fat grafting is a surgical procedure that takes fat from one part of your body, purifies it, and injects it into your face to restore lost volume. It’s used to fill in hollowed cheeks, smooth deep folds, plump lips, and rejuvenate areas that have thinned with age, trauma, or congenital conditions. Because the fat comes from your own body, it’s biocompatible, and the results can last for years, though a portion of the transferred fat is always reabsorbed.
How the Procedure Works
Facial fat grafting happens in three stages: harvesting, processing, and injection. The whole process can be done under local or general anesthesia depending on how much fat is being moved and which areas of the face are being treated.
During harvesting, a numbing solution is injected into the donor site, typically the abdomen, thighs, or flanks. After about 15 minutes, a small incision is made and a blunt-tipped tube called a cannula is inserted. The surgeon gently moves the cannula back and forth to loosen fat cells and draw them into a syringe. Low suction pressure is critical here because aggressive force damages fat cells and reduces how much of the graft ultimately survives.
Once harvested, the fat needs to be cleaned. The raw material contains blood, fluid, oil from ruptured cells, and anesthetic. Surgeons separate the usable fat using one of three methods: letting gravity settle the mixture over about 45 minutes, spinning it in a centrifuge for one to three minutes, or washing and filtering it through gauze. Each method produces a middle layer of intact, graftable fat while discarding the unusable top and bottom layers. No single processing technique has been shown to produce clearly better long-term results than the others.
Finally, the purified fat is loaded into small syringes and injected into precise facial locations through tiny entry points. Surgeons typically place the fat in small threads across multiple layers of tissue rather than depositing large amounts in one spot. This layering technique gives the fat cells better access to blood supply, which is essential for their survival.
Where Fat Is Placed on the Face
The procedure is remarkably versatile. The most common treatment areas include the cheeks and cheekbone region, temples, under-eye hollows and tear troughs, nasolabial folds (the creases running from the nose to the corners of the mouth), marionette lines around the chin, the forehead, lips, and the area around the jawline. Essentially, anywhere the face has lost padding or developed a sunken appearance is a potential target.
Some patients get fat grafting as a standalone procedure. Others combine it with a facelift or eyelid surgery for a more comprehensive result.
Microfat and Nanofat
Not all facial fat grafts are the same size. Microfat refers to small clumps of intact fat cells used for volume restoration, filling in hollows and plumping areas that have deflated. This is the standard approach for most facial fat grafting.
Nanofat is something different entirely. It’s created by processing the fat so aggressively that the fat cells themselves are destroyed, leaving behind a liquid rich in stem cells, growth factors, and collagen-stimulating compounds. Nanofat isn’t used for volume. Instead, it’s injected superficially to improve skin quality, reduce fine lines, and treat scars. Some surgeons use both in the same session: microfat for structure and nanofat for skin rejuvenation.
How Much Fat Survives
This is the biggest variable in fat grafting, and the most honest answer is: it depends. Studies report facial fat graft survival rates ranging from 30% to 83%, with follow-up periods spanning six months to nearly four years. That’s a wide range, and it reflects how many factors influence the outcome, including the surgeon’s technique, how the fat was processed, where it was placed, and individual biology.
A commonly cited benchmark from the American Society of Plastic and Reconstructive Surgeons is that about 30% of injected fat can be expected to survive at one year. Many modern practitioners report higher retention than that, but the reality is that some of the transferred fat will always be reabsorbed by the body. This is why surgeons often slightly overfill the treatment area during the procedure, and why some patients need a second session to reach their desired result.
The fat that does establish a blood supply and survive behaves like normal facial fat. It ages with you, responds to weight changes, and remains part of your tissue indefinitely.
Fat Grafting vs. Dermal Fillers
Both fat grafting and injectable fillers like hyaluronic acid restore facial volume, but they differ in several practical ways. Fillers are quicker, less invasive, and cheaper per treatment session, with results that typically last a few months to about a year before the product is absorbed. Fat grafting is a surgical procedure with a longer recovery, but the results can last for years, and many patients never need a repeat treatment.
The cost comparison shifts over time. Fillers are less expensive upfront but require ongoing maintenance. Fat grafting costs more initially but may be more cost-effective for someone planning to maintain their results over five or ten years. Fat grafting also offers something fillers cannot: the regenerative properties of your own stem cells and growth factors, which can improve skin texture in addition to restoring volume.
Recovery and Swelling
Expect noticeable swelling and bruising in both the face and the donor site for the first week or two. Facial swelling generally resolves within two to three weeks, while the donor site (your abdomen, thighs, or wherever fat was taken from) can stay swollen for four to six weeks, with most of the puffiness subsiding by three to four weeks.
Your face will look overfilled at first. This is intentional, because surgeons account for the fat that will be reabsorbed in the early weeks. The initial “too full” appearance settles as swelling goes down and some fat is naturally absorbed. Final results typically stabilize over three to six months as the surviving fat cells establish permanent blood supply in their new location.
Risks and Complications
Fat grafting uses your own tissue, which eliminates the risk of allergic reactions. But it’s still a surgical procedure with real complications to consider.
- Reabsorption and asymmetry: Uneven fat survival can leave one side of the face fuller than the other, sometimes requiring a touch-up procedure.
- Fat necrosis: Transferred fat cells that don’t receive adequate blood supply can die in place, forming firm lumps under the skin. This risk increases when large volumes of fat are deposited in a single area rather than layered in small amounts.
- Cyst formation: Related to fat necrosis, oil-filled cysts can develop, particularly with larger volume transfers.
- Overfilling: Too much fat in one area can compress surrounding blood vessels and tissue, potentially causing skin damage or prolonged swelling.
- Infection: As with any procedure involving incisions, bacterial or viral infections can occur at the cannula entry points or within the graft.
- Vascular complications: In rare cases, fat injected near blood vessels can enter the bloodstream. This is the most serious risk, as it can lead to blockages affecting vision or, in extremely rare cases, stroke.
The risk of serious vascular complications is low but not zero, and it’s one reason why facial fat grafting should be performed by a surgeon experienced in facial anatomy. The depth, angle, and pressure of injection all matter for safety.