Lipofilling (Fat Transfer)

One area looks sunken, thinned out, or short on volume; another area has fat to spare. Lipofilling brings those two situations together: fat is harvested from where the body has extra, processed, and moved to where it is needed. Because the material is the patient's own tissue rather than a foreign substance, many people find the approach more natural than the alternatives.

What often gets lost, though, is that fat is not a fixed filler that stays put the moment it leaves the syringe. It is living tissue. To become permanent, it has to take hold in its new location and establish a blood supply. That single fact drives the most misunderstood part of the procedure: a portion of the injected fat is reabsorbed by the body over the first few months. The aim of this guide is to describe the method plainly — what is realistic, what is exaggerated, and who is and is not a suitable candidate.

Below you will find how lipofilling is performed, which areas it can treat, what its longevity actually depends on, what recovery looks like week by week, and the risks that deserve an honest conversation. The goal is simple: enough understanding that when you sit down for a consultation, you can ask your surgeon the right questions.

What Is Lipofilling?

Lipofilling — also called fat injection or fat transfer — is the process of taking fat from a person's own body, processing it, and injecting it into another area. In medical literature it is known as autologous fat grafting; "autologous" simply means the tissue comes from the patient rather than a donor.

The procedure has three stages, and each one shapes the result:

• Harvesting the fat: Using fine cannulas and gentle suction, fat is collected from an area where it is relatively abundant — the abdomen, flanks, inner thighs, or back. The aim is to gather the fat cells without damaging them.
• Processing the fat: The harvested fat is separated from blood, fluid, and damaged cells. Spinning it down (centrifugation) or filtering it leaves behind purified, living fat cells.
• Injecting the fat: The prepared fat is placed into the target area through fine cannulas, in many small tunnels and thin layers. This "small amounts across many points" approach is critical, because it lets each fat cell draw nourishment from the surrounding tissue.

Here is the key idea: transplanted fat survives to the extent that it can establish its own blood supply in the new location. That is why how the fat is placed matters as much as how much is placed.

Lipofilling is used both for fine volume adjustments on the face and for larger-scale body contouring. The same method serving such different purposes comes down to the versatility of the tissue itself.

Which Areas Can Lipofilling Treat?

Fat transfer can come into play almost anywhere volume has been lost. The most common areas include:

• Face: With age, the fat pads of the face shrink and the face begins to hollow. The cheekbones, temples, under-eye hollows, cheeks, and jawline can all be supported with fat injection. In facial rejuvenation, lipofilling is used on its own or alongside a lift.
• Lips: Lip augmentation with a person's own fat is possible, and it behaves differently from a hyaluronic acid filler in terms of longevity and feel.
• Breast: Fat transfer is used for patients who want a modest increase in volume without an implant, or to soften edge irregularities in an already implanted breast. Its limits and predictability are a separate discussion.
• Buttocks (Brazilian Butt Lift): Fat injection to the buttocks is one of the best-known body applications for adding volume and shape — and also the area whose risk profile calls for the most caution.
• Back of the hands: Fat can be injected into the back of the hands to soften the veins and tendons that grow more prominent with age.
• Depressed scars and contour defects: Sunken scars after surgery or trauma, and volume loss beneath the skin, can be filled with fat transfer.

The volume involved varies enormously by area: a few millilitres for the face, but hundreds of millilitres for the buttocks. That difference in scale changes both the technique and the risks.

Lipofilling vs. Dermal Filler (Hyaluronic Acid): What's the Difference?

These are the two treatments patients most often confuse. Both add volume to an area, but the similarity ends there.

Hyaluronic acid filler is a ready-made gel injected with a needle. It can be done in a clinic setting in a few minutes, and the result is visible straight away. Over time, though, the body breaks the gel down; depending on the area and the product, the effect generally lasts anywhere from a few months to a couple of years before it needs repeating. A notable advantage is that if you dislike the result or a problem arises, it can be dissolved with a specific enzyme.

Lipofilling, by contrast, is a surgical procedure. Because fat has to be harvested first, it calls for an operating-room setting, appropriate anaesthesia, and a longer recovery. In return, the fat cells that successfully take hold are lasting — there is no annual top-up. Another difference is that harvesting fat also slims the donor area, giving you the "take from one place, add to another" advantage.

In short: filler is fast and reversible but temporary; lipofilling is a bigger procedure with lower predictability, but the fat that survives is lasting. Which one suits you depends on the target area, the volume you want, and whether there is enough harvestable fat on your body.

Who Is a Good Candidate — and Who Isn't?

Two basic conditions are needed for lipofilling: a target area that needs volume, and enough donor fat to harvest. In very lean patients, the amount of fat available is limited, which can make the desired volume harder to reach.

In general terms, a suitable candidate is someone who:

• Is in good enough general health for surgery and appropriate anaesthesia,
• Has enough harvestable fat on the body,
• Holds realistic expectations and accepts that the result can vary to some degree.

Some situations call for delaying the procedure or changing the plan:

• Smoking. Smoking impairs the tissue's blood supply and directly reduces how well the transferred fat takes hold. Most surgeons ask that it be stopped at least three to four weeks beforehand.
• Conditions that raise surgical risk, such as uncontrolled diabetes, a bleeding disorder, or an active infection.
• A planned significant weight loss in the near term. Marked weight change can alter the volume of the transferred fat, so planning is more accurate once you are close to a stable weight.
• An unassessed lump or a suspicious imaging finding in the breast. If fat transfer to the breast is being considered, breast-health screening is completed first.
• Unrealistic expectations. Expecting "exactly the volume I want, in a single session, guaranteed" runs against the reality that some of the fat may be reabsorbed; dissatisfaction is more likely in these patients.

The decision on suitability is made only through examination. No article, photo, or phone call can replace a physical examination and a physician's assessment.

Consultation and Planning

The first consultation is among the stages that most determine how well the procedure goes. Here your surgeon assesses two areas at once: the donor site the fat will be taken from, and the target site it will be moved to.

When the donor site is assessed, the amount and distribution of fat are examined; the abdomen, flanks, inner thighs, and back are the most commonly chosen areas. At the target site, the assessment covers how much volume is needed, the state of the skin and tissue, and the position of nearby structures.

A few things are worth discussing openly at this visit:

• Every medication you take — especially blood thinners, hormone preparations, and any herbal supplements you take regularly — should be reported in full.
• Your smoking and alcohol use will be asked about, because of their effect on healing.
• Any previous surgeries and any chronic conditions are recorded.

Depending on your age and risk profile, blood tests and an anaesthesia assessment are requested. If fat transfer to the breast is planned, breast imaging is completed at this stage.

One topic that often comes up in planning is the possibility of more than one session. Because some of the fat may be reabsorbed — particularly in areas where a large volume is the goal — a second session may be needed to reach the desired result. Raising this from the outset keeps the process realistic.

Technique Options and Comparison

The basic logic of lipofilling is the same everywhere: harvest, process, place. But how the fat is processed and the scale of the target area change the technique. The table below roughly compares the areas most commonly treated; exact figures vary from person to person and depend on the surgeon's assessment.

Fat is processed in different ways — centrifugation, filtering, washing — but the aim is always the same: to obtain living, purified fat cells. In some centres the fat is broken down into finer particles before injection (techniques such as microfat) for use in thin areas close to the surface. Which method is chosen depends on the goal, and that is a decision for the surgeon.

For buttock work there is a specific safety point: fat is placed only in the layer above the muscle, never inside it, and ultrasound guidance makes this safer. This technical detail is aimed at reducing the likelihood of a serious complication discussed in the risks section below.

What Happens on the Day of the Procedure?

Depending on its scope, the procedure is performed either under local anaesthesia with sedation or under general anaesthesia. Limited facial volumising can be done with sedation, whereas large-volume applications such as breast and buttocks usually call for general anaesthesia.

Before surgery, and with you standing, your surgeon marks the borders of both the donor and target areas. These markings are the map for the procedure. The fat is then harvested with fine cannulas; the collected fat is processed, prepared for injection, and placed into the target area in many fine tunnels.

The procedure takes roughly one to four hours, depending on the area and volume treated. When you wake, you will have entry points at both the donor and recipient sites, and possibly a compression garment or dressing. Because the donor area has effectively had a small liposuction, expect some tenderness and bruising there too in the first few days.

Small-volume facial procedures often mean same-day discharge; for larger body procedures, an overnight stay for observation may be preferred. When you are discharged, someone should be with you to accompany you home, and you should not drive for the first 24 hours.

Recovery, Week by Week

First 72 hours. Swelling and bruising are at their most pronounced at both the donor and recipient sites. The treated area looks fuller than it should in these early days; that is the effect of swelling and of excess fat that will be reabsorbed, not the final result. Keeping pressure off the target area matters especially — the newly settled fat cells are still fragile.

Week 1. Swelling gradually eases but is still noticeable. Bruising starts to change colour. Desk-based workers can generally return by the end of this week, depending on the area treated and its extent. With buttock work, the sitting restriction is followed carefully during this period.

Week 2. Most of the significant swelling resolves; the entry points are largely closed. You can return to light daily activity. Heavy lifting and strenuous movements are still restricted.

Week 4. Walking-pace exercise is usually permitted. The area starts to look closer to the final result around now, but some of the fat is still in the process of being reabsorbed — so the volume you see is not the final volume.

Month 3. The reabsorption process is largely complete. The fat that has taken hold is now considered lasting, and the volume seen at this point is quite close to the long-term result. Tenderness and any irregular feel at the donor site also settle markedly by now.

Month 6. Both the target and donor areas reach their final state. Whether a second session is needed is usually decided based on the assessment at this point.

This timeline is an average framework. The area treated, the volume, and your own healing pace can shift it earlier or later; your surgeon will update the exact schedule at your follow-up visits.

Is Lipofilling Permanent? How Much Fat Stays?

This is the question patients ask most and are most often misinformed about, which is why it deserves its own heading.

The honest answer: not all of the transferred fat stays. The fat cells that manage to establish a blood supply in their new location become lasting, while a portion that cannot be nourished is reabsorbed by the body over the first few months. The proportion reabsorbed varies with the person, the area, and the technique, so putting a single firm percentage on it would be misleading. For this reason surgeons often place somewhat more fat than the target volume — this "reabsorption margin" is factored into the plan from the start.

Here is what matters: the fat still in place at three to six months is considered lasting. Once it has taken hold, those fat cells go on living in that area. In this respect, lipofilling differs from temporary fillers that need regular repeating.

That said, "lasting" does not mean "never changes." The fat cells that survive behave like the rest of the body: gain weight and the area may fill out a little; lose weight and it may thin. Ageing and gravity affect this area over time, just as they do all tissue. This is why a stable weight contributes directly to preserving the result.

How many sessions are needed follows from all of this. Small-volume facial procedures are often enough in a single session, whereas areas targeting a large volume may need a second session to reach the desired fullness. That is not a failure — it is part of the nature of the method.

Risks and Complications

No surgical procedure is without risk, and lipofilling is no exception. The following are not seen in most patients, but they can occur. The decision to proceed should be made with this information in hand.

Common, temporary effects: Swelling, bruising, and tenderness after the procedure are expected at both the donor and target sites and settle over the following weeks. A temporary firmness may be felt in the treated area.

Reabsorption and volume loss: Losing a portion of the fat is the natural course of the method rather than a complication, but more reabsorption than expected can leave insufficient volume and create a need for a further session.

Irregularity and asymmetry: If the fat does not settle evenly, it can create dips and bumps on the skin surface or a difference in volume between the two sides. Small irregularities may soften over time; pronounced ones may need correction.

Fat necrosis: Fat cells that cannot be nourished can harden into palpable nodules. In the breast in particular, these nodules may be picked up on imaging and, when needed, further investigation may be requested to distinguish them from breast cancer. This is a feature of breast fat transfer that should be understood in advance.

Calcification: Over time, calcium deposits can form in some areas of fat necrosis; these too require assessment on imaging.

Infection and bleeding: As with any surgery, infection, haematoma (a collection of blood), and wound-healing problems are possible; smoking markedly increases these risks.

Fat embolism: A rare but serious complication that can arise — particularly with fat injection to the buttocks — if fat inadvertently enters a large blood vessel. To reduce this risk, the standard approach today is to place the fat in the layer above the muscle rather than inside it, under ultrasound guidance and with correct cannula technique. That this area demands such particular care shows why it should be performed in experienced hands and with proper equipment.

Risks related to general anaesthesia apply to procedures performed under it and are addressed in the pre-operative assessment.

The point of this list is not to frighten you but to make you part of the decision. Careful patient selection, sound technique, and regular follow-up either prevent most of these risks or catch them early. Even so, any claim of "zero risk" or a "guaranteed result" does not reflect reality.

What to Expect in the Long Term

The fat that survives is lasting, but the body keeps living. Weight fluctuations, ageing, and gravity affect every tissue over time — transferred fat included. Marked weight gain or loss can change the volume in the treated area too, which is why a stable weight is the single most effective habit for preserving the result.

In facial applications, the result tends to blend into the natural ageing process; the area may lose some volume again over the years, but gradually rather than suddenly. In areas such as the breast and buttocks, the shape is held for a long time, depending on how much fat has taken hold and on the person's weight over time.

There is one point patients who have had breast fat transfer should keep in mind for the long term: areas of fat necrosis and calcification can show up on breast imaging in later years. For that reason, telling the imaging centre about your fat-transfer history is important for accurate assessment. Having had fat transfer does not exempt you from age-appropriate breast cancer screening.

Whether or not you are satisfied has a great deal to do with how realistic the expectation was. Seeing lipofilling not as a "magic filler done once and forgotten," but as a volumising method performed with your own tissue — one that carries some unpredictability yet is lasting once it takes hold — sets the right expectation.