Fat Grafting / Fat Transfer

Introduction

Fat grafting, also called fat transfer or autologous fat transplantation, is a surgical technique that uses your own body fat as a natural filler. Small amounts of fat are gently removed from one area of the body, processed, and then reinjected into another area that needs more volume, smoother contour, or improved tissue quality.

The procedure is used in both cosmetic and reconstructive surgery. People consider fat grafting for many reasons — restoring lost volume in the face, softening the appearance of scars, refining body contours, rebuilding tissue after breast cancer surgery, or improving the look of the hands. Because the material being transferred is the patient’s own living tissue rather than a synthetic product, the results tend to feel natural and can last for years, though some of the transferred fat is absorbed by the body in the months after surgery.

This article is written for adults who are planning, considering, or preparing for fat grafting surgery. It explains how the procedure works, the different areas where it is commonly used, the alternatives to consider, how to prepare, what happens in the operating room, what recovery looks like, the risks involved, and what results to expect over time.

What Is Fat Grafting?

Fat grafting is a surgical procedure in which fat cells are taken from an area of the body where they are abundant — such as the abdomen, thighs, hips, or flanks — and transferred to an area where additional volume, padding, or contour is needed. The full clinical term is “autologous fat transplantation,” where “autologous” means the tissue comes from your own body.

1. Harvesting — fat is gently suctioned from the donor area using a thin tube called a cannula, in a process similar to a small liposuction.
2. Processing — the harvested fat is separated from blood, fluid, and damaged cells. This can be done by allowing it to settle, by gentle centrifugation (spinning), or by filtering. The goal is to keep healthy, viable fat cells while removing material that would not survive the transfer.
3. Reinjection — the purified fat is injected in small amounts through a fine cannula into the recipient area. The surgeon places the fat in many tiny passes and across different tissue layers so that each fat droplet sits near a blood supply that can keep it alive.

Because fat is living tissue, not all of it survives the transfer. The portion that does survive becomes a permanent part of the recipient area. The portion that does not is gradually absorbed by the body during the first few months. Surgeons account for this expected absorption by transferring slightly more fat than the final desired volume.

Fat grafting has a wide range of cosmetic and reconstructive uses. Doctors may recommend it when the goal is to add soft, natural-feeling volume to an area that has lost tissue through ageing, weight loss, surgery, trauma, or disease.

Facial rejuvenation

With age, the face naturally loses fat in the cheeks, temples, around the eyes, and along the jawline. This loss of volume contributes to a hollowed, tired, or sunken appearance and to the deepening of folds and lines. Fat grafting is used to restore volume to the cheeks, temples, tear troughs (the hollows under the eyes), nasolabial folds, lips, chin, and jawline. It is sometimes performed alongside a facelift or eyelid surgery to address both skin laxity and volume loss in the same operation.

Breast reconstruction and revision

Fat grafting plays an important role in breast surgery, particularly after cancer treatment. It is used to smooth contour irregularities after lumpectomy, to soften the edges of implant-based reconstructions, to add coverage over implants, and as part of staged reconstruction after mastectomy. In some cases, repeated sessions of fat grafting can be used to rebuild a breast mound entirely without an implant. Fat grafting is also used to correct asymmetry between the breasts or to refine the results of a previous breast surgery.

Hand rejuvenation

The backs of the hands lose volume with age, making veins, tendons, and bones more visible. Fat grafting can restore a smoother, more youthful appearance to the hands by adding a thin layer of soft tissue over these structures.

Scar and contour correction

Depressed or tethered scars — from acne, surgery, injury, or radiation — can sometimes be softened by injecting fat beneath the scar. The fat lifts the depressed area and may also improve the quality of the surrounding skin over time. Fat grafting is also used to correct contour irregularities left by previous liposuction or trauma.

Body contouring

Fat grafting is used to add volume and shape to areas of the body, most commonly the buttocks and hips. This is sometimes referred to as gluteal fat grafting. The procedure has specific safety considerations that are addressed later in this article.

Reconstructive uses in other areas

Fat grafting is also used in reconstructive surgery for conditions such as hemifacial atrophy (Parry-Romberg syndrome), cleft lip and palate revision, congenital chest wall deformities, post-traumatic soft tissue loss, and radiation-related tissue damage. In these reconstructive contexts, fat grafting may also be used in younger patients, including children, but always under the care of a specialised reconstructive surgical team.

Who Is a Candidate?

Suitability for fat grafting is a clinical decision made between you and your surgeon during a detailed consultation. In general, doctors consider fat grafting for people who:

• Have a specific area of volume loss, contour irregularity, or tissue deficit that fat transfer can address
• Have enough donor fat to harvest — very lean individuals may not have sufficient fat available, particularly for larger-volume procedures
• Are in good general health and free of conditions that significantly increase surgical risk
• Do not smoke, or have stopped smoking several weeks before surgery, because smoking reduces fat survival and slows healing
• Have stable body weight, since significant weight changes after surgery can alter the results
• Understand that some of the transferred fat will be absorbed and that more than one session may be needed
• Have realistic expectations about what the procedure can and cannot achieve

Fat grafting may not be appropriate, or may need careful planning, for people with bleeding disorders, uncontrolled diabetes, active infection at the donor or recipient site, or certain autoimmune conditions. A history of breast cancer is not itself a barrier to facial or body fat grafting, but for breast fat grafting your surgeon will coordinate with your oncology team to plan timing and imaging follow-up.

Alternatives to Fat Grafting

Fat grafting is one of several options for restoring volume or improving contour. The right choice depends on the area being treated, the amount of correction needed, how long the result should last, and personal preference. Doctors typically discuss the following alternatives during consultation.

Hyaluronic acid and other dermal fillers

Injectable fillers based on hyaluronic acid (such as those in the Restylane and Juvederm families), calcium hydroxylapatite, or poly-L-lactic acid can add volume to the face, hands, and certain other areas without surgery. The procedure is brief, requires little downtime, and results are visible immediately. The trade-off is that filler results are temporary — typically lasting six months to two years depending on the product and area — and ongoing treatments are needed to maintain volume. Fillers are a common starting point, especially for smaller corrections, and many people use fillers for years before considering fat transfer.

Implants

For larger or more defined volume changes, solid implants are an option. Examples include cheek and chin implants for facial contouring, breast implants for augmentation or reconstruction, and gluteal implants for buttock augmentation. Implants give predictable, stable shape but involve a foreign material and the risks associated with it, including capsular contracture, malposition, and the eventual need for revision or replacement.

Surgical lifts and tightening procedures

When the main concern is sagging skin rather than volume loss, procedures such as a facelift, brow lift, neck lift, breast lift, or body lift may be more appropriate. These do not add volume but reposition existing tissues. Fat grafting and lifting procedures are often combined in the same operation when both skin laxity and volume loss are present.

Energy-based skin treatments

Devices using radiofrequency, ultrasound, or laser energy can tighten skin and improve texture, though they do not restore lost volume. They may be used as adjuncts before or after fat grafting to improve skin quality.

No procedure

For many concerns, no treatment is also a reasonable choice. Volume loss with age is normal and not a medical problem. The decision to have fat grafting is personal, and choosing not to proceed — or to defer the decision — is always a valid option.

Procedural Approaches and Techniques

While the broad sequence of harvest, processing, and reinjection is consistent, surgeons use a range of techniques. Understanding these can help you have an informed conversation with your surgeon about the planned approach.

Harvesting techniques

Fat is most often harvested using low-pressure liposuction with a fine cannula. Gentle suction is used because aggressive techniques can damage fat cells and reduce the proportion that survives after transfer. Common donor sites are the abdomen, inner and outer thighs, flanks (love handles), and inner knees. The choice of donor site depends on where you have enough fat available and on your own preferences about contouring.

Processing techniques

The harvested fat contains a mixture of fat cells, blood, fluid from the tumescent solution used during liposuction, and damaged tissue. Surgeons process the fat to isolate the healthy fat cells. Methods include:

• Decantation — allowing the fat to separate by gravity
• Centrifugation — spinning the fat at controlled speeds to separate components
• Washing and filtration — using closed systems to rinse and filter the fat

Each method has supporters in the surgical literature, and good results are reported with all of them when performed carefully.

Reinjection techniques

For the transferred fat to survive, each small droplet must lie close to a blood supply that can grow into it. Surgeons therefore inject fat in many tiny aliquots through a fine cannula, distributed across different tissue depths and in a fan-like pattern. Larger pockets of fat are avoided because the centre of a large pocket cannot reach a blood supply quickly enough and may die, leading to fat necrosis or cyst formation.

Microfat and nanofat

Standard fat grafting uses fat particles large enough to add visible volume. For delicate areas such as the lower eyelids, lips, or fine lines, surgeons may use “microfat” (further filtered fat with smaller particles) or “nanofat” (mechanically processed fat that no longer contains intact fat cells but contains regenerative components, used to improve skin quality rather than to add volume).

Gluteal fat grafting and safety

Gluteal fat grafting (sometimes called Brazilian butt lift) deserves a specific note. Following safety reviews led by international plastic surgery societies, including the American Society of Plastic Surgeons and the Aesthetic Society, surgeons are advised to inject fat only into the subcutaneous tissue (the layer just beneath the skin) and not into or beneath the gluteal muscle. Injection into the muscle has been linked to rare but serious cases of fat entering large veins and travelling to the lungs (fat embolism), which can be fatal. Current guidance also favours the use of larger-bore cannulas, single direction of injection, and intraoperative ultrasound where available. If you are considering gluteal fat grafting, it is reasonable to ask your surgeon directly about which techniques they use to follow these safety recommendations.

Choosing a Surgeon

Fat grafting is a technically demanding procedure, and outcomes depend significantly on the surgeon’s training, experience, and judgment. When choosing a surgeon, it is reasonable to look for:

• Specialist qualifications in plastic, reconstructive, and aesthetic surgery
• Specific experience with the area you are considering — facial fat grafting, breast fat grafting, and gluteal fat grafting each require distinct skills
• Before-and-after photographs of the surgeon’s own patients, ideally including patients with anatomy similar to yours
• A surgical facility with appropriate accreditation, monitoring equipment, and emergency protocols
• Time to discuss the procedure thoroughly, including alternatives, expected results, and risks — and willingness to answer questions about technique
• A consultation that does not pressure you into a decision

Meeting more than one surgeon before deciding is reasonable, particularly for elective procedures.

Preparing for Fat Grafting

Preparation begins weeks before surgery. Specific instructions vary between surgeons, but typical pre-operative steps include:

• A detailed consultation — reviewing your medical history, current medications, prior surgeries, and goals; examining the donor and recipient areas; discussing realistic outcomes; and planning the approach
• Medical clearance — blood tests, and depending on age and health, an electrocardiogram (ECG) or other investigations
• Stopping smoking and nicotine — ideally several weeks before surgery and continuing during recovery, because nicotine reduces blood flow and significantly lowers fat survival
• Reviewing medications — your surgeon will advise on which medicines and supplements to stop. Blood-thinning medications, anti-inflammatories such as ibuprofen and aspirin, and certain herbal supplements are commonly paused before surgery
• Maintaining stable weight — significant weight gain or loss can change the appearance of the result
• Avoiding alcohol for several days before surgery
• Arranging time off and support — planning for someone to drive you home, help at home in the first day or two, and being realistic about the time you will need away from work and exercise
• Fasting as instructed before general anaesthesia

For women considering breast fat grafting after cancer treatment, your surgeon will coordinate timing with your oncology team and may arrange baseline imaging of the breast before surgery.

What Happens During the Procedure

Fat grafting is usually performed as an outpatient procedure, meaning you go home the same day, although larger-volume body procedures may involve an overnight stay. The length of the operation depends on the volume of fat being transferred and the number of areas treated. Small facial procedures may take an hour or less, while larger body procedures can take three hours or more.

1. Marking — with you standing or sitting, the surgeon marks the donor sites and recipient areas, planning the volume and direction of fat transfer.
2. Anaesthesia — depending on the volume and area, fat grafting may be done under local anaesthesia, local with sedation, or general anaesthesia. Small facial procedures can often be done under local anaesthesia with sedation; larger body procedures usually require general anaesthesia.
3. Tumescent infiltration — a dilute solution containing local anaesthetic and adrenaline is infiltrated into the donor area to numb the tissue, reduce bleeding, and make fat removal easier.
4. Harvesting — fat is gently suctioned through small incisions, usually a few millimetres long, hidden where possible in skin creases.
5. Processing — the harvested fat is purified using the surgeon’s chosen method.
6. Reinjection — the purified fat is injected through fine cannulas into the recipient area in small amounts, distributed evenly across tissue layers.
7. Closure and dressings — the small incisions are closed with sutures or left to heal naturally, and dressings or compression garments are applied to the donor area.

Throughout the procedure, your vital signs are monitored. Once the operation is complete, you spend time in a recovery area until the anaesthesia wears off and you are able to leave with someone to accompany you home.

Recovery and Healing

The first week

Most people experience swelling and bruising at both donor and recipient sites. The donor area may feel sore, tight, or numb in patches. The recipient area — especially the face — can look notably swollen for the first few days, and the volume may initially appear larger than the final result. Discomfort is usually manageable with prescribed medication. Many people return to light, non-strenuous activity within a few days, though this varies with the size and location of the procedure.

Weeks two to six

Bruising fades, and swelling reduces gradually. The transferred fat goes through a settling process during which some of it is reabsorbed by the body. The amount that is reabsorbed varies widely between individuals and depends on the technique, the area treated, and how well you follow aftercare instructions. Most patients return to light exercise after about two weeks and to more strenuous activity after four to six weeks, on their surgeon’s advice.

Months three to six

By around three months, most of the resorption has occurred and the surviving fat has integrated into its new location. The final result becomes apparent over three to six months. At this point, the surviving fat is considered a permanent part of the area, though it remains living tissue that responds to weight changes — if you gain or lose significant weight, the transferred fat will gain or lose volume along with the rest of your body.

Aftercare guidance

Surgeons typically advise:

• Wearing a compression garment over the donor area for several weeks, as instructed
• Avoiding direct pressure on the recipient area — for example, sleeping on your back after facial fat grafting, or avoiding sitting directly on the buttocks after gluteal fat grafting for the period your surgeon specifies
• Keeping incision sites clean and dry as directed
• Taking prescribed medications, including any antibiotics
• Avoiding smoking and nicotine throughout recovery
• Staying well hydrated and eating a balanced diet to support healing
• Avoiding strenuous exercise, sauna, and swimming until cleared
• Attending follow-up appointments so the surgeon can monitor healing and the settling of the graft

Because the survival of the transferred fat depends in part on how the recipient area is treated in the first weeks, careful adherence to aftercare instructions matters for the final result.

Risks and Complications

Fat grafting is considered a relatively safe procedure when performed by an appropriately trained surgeon in a properly equipped facility. As with any surgery, complications can occur. Knowing what they are helps you recognise problems early.

Common, usually self-limiting issues

• Swelling, bruising, and tenderness at both donor and recipient sites
• Temporary numbness or altered sensation
• Minor asymmetry as swelling resolves at different rates
• Mild contour irregularities that often improve with time

Less common but significant complications

• Partial fat resorption beyond the expected range, leading to under-correction and the need for a touch-up procedure
• Fat necrosis — areas where transferred fat does not survive may form firm lumps, oil cysts, or, rarely, calcifications. These can sometimes be felt as firm areas under the skin and may require further treatment
• Infection at the donor or recipient site, usually treated with antibiotics
• Contour irregularities at the donor site — small dents or unevenness from the liposuction component
• Asymmetry requiring revision
• Visible scarring at the small incision sites, though these are usually well concealed
• Skin discolouration that usually fades but can persist

Rare but serious complications

• Bleeding or haematoma requiring evacuation
• Deep vein thrombosis (a blood clot in a leg vein) and pulmonary embolism, risks present with most surgeries under general anaesthesia
• Anaesthetic complications
• Fat embolism syndrome — an extremely rare but serious event in which fat enters the bloodstream. The risk is highest with gluteal fat grafting if fat is injected into or beneath the muscle, which is why current safety guidance restricts injection to the subcutaneous layer
• Visual changes after facial fat grafting — rarely, fat injected into the face has caused vision problems through inadvertent entry into blood vessels supplying the eye. This is very uncommon but has led surgeons to use specific techniques to minimise the risk

When to call your surgical team after surgery: increasing or severe pain not controlled by prescribed medication, fever, redness or discharge from the incisions, sudden swelling, calf pain or swelling, shortness of breath, chest pain, or any visual change. These symptoms can indicate complications that need urgent assessment.

Life After Fat Grafting

The portion of fat that survives the transfer becomes a permanent part of the area into which it was placed. It behaves like the body’s other fat tissue — it grows when you gain weight and shrinks when you lose weight. Maintaining a stable weight after surgery helps preserve the result.

For facial fat grafting, the result interacts with the ongoing natural process of facial ageing. The transferred fat does not prevent further volume loss in other areas, and some people choose touch-up procedures years later to maintain their result.

For breast fat grafting after cancer surgery, continued follow-up with your oncology and reconstructive team is important. Fat grafting can cause changes on breast imaging — including small areas of calcification or oil cysts — that radiologists experienced in post-surgical breast imaging can distinguish from concerning findings. You will be advised on what imaging to have and when.

For gluteal and body fat grafting, the contour result is usually stable once the initial resorption is complete, but again responds to weight change.

Some people are satisfied with the result of a single procedure. Others choose to have a second session several months later, either to add more volume in the same area or to refine the result. Whether a touch-up is appropriate is a discussion between you and your surgeon based on how the first procedure has settled.

Frequently Asked Questions

Is fat grafting permanent?

The fat that survives the transfer is permanent in the sense that it remains living tissue in its new location and is not gradually absorbed away like a synthetic filler. However, not all of the transferred fat survives — some is reabsorbed by the body in the first few months. The final volume that remains after three to six months is generally considered the lasting result. That tissue continues to age and to respond to weight changes like the rest of your body.

How much of the transferred fat survives?

Fat survival varies depending on the area treated, the surgical technique, and individual factors. Reported survival rates in the surgical literature span a wide range, often quoted as around 50 to 70 percent, though some areas and techniques achieve more or less. Surgeons account for expected resorption by transferring more fat than the final desired volume.

Will I lose weight from the area where fat was taken?

Yes, the liposuction component of fat grafting removes fat from the donor area, leading to some contouring of that area. The amount of fat removed for grafting is typically modest compared with a full liposuction procedure, but you can usually expect a visible improvement at the donor site as well.

Is fat grafting painful?

Most people describe the discomfort as moderate, particularly soreness at the donor site, similar to the feeling after a hard workout. Pain is usually well controlled with prescribed medication and improves substantially within the first week.

How long until I can return to work?

This depends on the procedure. People having small facial fat grafting may return to office-based work within a few days to a week, when bruising can be concealed. Larger body procedures, particularly gluteal fat grafting, often require longer time off because of restrictions on sitting and movement. Your surgeon will give specific guidance based on your operation and your work demands.

Can fat grafting be combined with other procedures?

Yes. Fat grafting is often performed alongside other procedures, such as a facelift, eyelid surgery, breast lift, breast implant exchange, or tummy tuck. Combining procedures can reduce overall recovery time compared with separate surgeries but extends the length of any single operation and may slightly increase anaesthetic and surgical risk. Whether combining is appropriate is a clinical decision based on your health, the procedures involved, and the surgeon’s judgment.

Will I need more than one session?

Sometimes. For larger volume needs, for areas with poor tissue quality (such as after radiation), or when the goal is to rebuild substantial volume (for example, in some breast reconstructions), more than one session is commonly planned. For straightforward facial volume restoration, a single procedure is often sufficient, with the option of a touch-up if desired.

Does fat grafting cause cancer or interfere with cancer detection?

Current evidence does not show that fat grafting causes cancer. In the breast specifically, fat grafting can produce changes visible on imaging — such as small calcifications or oil cysts — that radiologists experienced in post-surgical breast imaging can distinguish from suspicious findings. Continued surveillance imaging after breast cancer remains important and is not prevented by fat grafting.

What is the difference between fat grafting and fillers?

Fillers are manufactured substances injected into tissue to add volume. They are usually performed in a clinic without anaesthesia, take minutes, and produce immediate results that last from months to a couple of years. Fat grafting is a surgical procedure that uses your own fat, requires anaesthesia, involves a recovery period, but produces a lasting result. Many people consider fillers as a way to test how added volume might look before deciding whether to proceed with surgery.

Can fat grafting replace a facelift?

No — the two procedures address different problems. A facelift repositions sagging skin and underlying tissues but does not restore lost volume. Fat grafting restores volume but does not lift loose skin. For people with both volume loss and skin laxity, surgeons commonly combine the two procedures.

Conclusion

Fat grafting offers a way to use the body’s own tissue to restore volume, refine contours, and improve the quality of areas affected by ageing, surgery, or injury. Across its many applications — from facial rejuvenation to breast reconstruction to body contouring — the underlying principle is the same: take fat from where there is enough, treat it gently, and place it where it is needed in a way that allows it to survive.

The procedure has matured significantly over recent decades, with refined techniques, better understanding of how to support fat survival, and clearer safety guidance, particularly for higher-risk applications such as gluteal fat grafting. Results are typically natural in feel and lasting, though some early absorption is expected and more than one session may be needed for larger goals.

As with any elective surgery, the decision to proceed is personal. A thorough consultation with an experienced surgeon, a clear understanding of what fat grafting can and cannot achieve in your specific situation, honest discussion of alternatives, and realistic expectations together provide the foundation for a result you are likely to be satisfied with over the long term.