Liposuction explained: what actually happens during the procedure?

Liposuction is one of the most commonly performed body-contouring procedures, but it is also one of the most misunderstood. I often hear it described simply as "having fat removed".

Technically, yes, fat is removed. But the purpose of liposuction is not simply to remove as much fat as possible. The aim is to reshape and contour the body while maintaining appropriate proportions and respecting the surrounding tissues.

That distinction is important.

What exactly is liposuction?

Liposuction is a surgical procedure used to remove localised deposits of subcutaneous fat, the fat located underneath the skin.

During the procedure, small incisions are made in the treatment area and a thin surgical instrument called a cannula is introduced beneath the skin. The cannula is moved through the fatty layer to loosen and remove selected fat through suction.

The surgeon does not simply empty an area of fat. The procedure requires controlled removal from different areas and depths to create a smoother, more balanced contour.

This is why liposuction should be thought of as body sculpting rather than weight-loss surgery.

What areas can be treated?

Liposuction can be performed on many different areas of the body. Common treatment areas include:

• Abdomen
• Waist and flanks
• Lower and upper back
• Hips
• Thighs
• Arms
• Under the chin
• Selected areas around the knees or chest

Several areas can sometimes be treated during the same operation. You may therefore hear terms such as 360 liposuction. This usually refers to circumferential contouring of the torso: treating selected areas around the abdomen, waist, flanks and back rather than approaching the body only from the front.

The exact areas included should always be confirmed in your surgical plan.

What happens to the fat cells?

This is another question I am asked frequently. During liposuction, fat cells are physically removed from the treated area. Those particular cells do not simply regenerate in the same way after being removed.

However, this does not mean that you can never gain weight in that area again. The fat cells remaining in the body can still increase in size if you gain weight. Significant weight changes can therefore alter the result and affect body proportions.

This is why liposuction is generally most appropriate for body contouring at a relatively stable weight, rather than being used as a method of losing weight.

What is VASER liposuction?

VASER is a form of ultrasound-assisted liposuction. Before the fat is removed, ultrasound energy is delivered into the treatment area to help disrupt the fatty tissue. The loosened fat can then be removed using liposuction cannulas.

VASER can be particularly useful when the surgical objective involves more detailed body contouring and definition. But this is important:

VASER is a tool. The result still depends heavily on the surgeon performing the procedure.

Technology cannot replace surgical planning, anatomical knowledge or technique.

What about skin tightening?

Removing fat and tightening skin are two different things.

After liposuction, the skin needs to adapt to the new contour underneath it. How well it does this depends on factors including skin quality, age, genetics, previous weight changes, pregnancy and the amount of fat removed. Some patients already have good skin elasticity. Others may have significant laxity.

In selected cases, additional technologies designed to produce controlled tissue contraction may be used alongside liposuction. However, these technologies do not turn severely loose skin into tight skin and they do not replace surgical skin removal when there is substantial excess.

This is one of the most important expectations to understand before liposuction.

Can liposuction remove loose skin?

No. Liposuction removes fat. It does not surgically remove excess skin.

If someone has a significant abdominal skin overhang, for example, simply removing the fat underneath may not create the result they are expecting. This is one reason liposuction is commonly incorporated into a tummy tuck when abdominal skin removal is required.

The tummy tuck addresses the excess skin and abdominal wall where indicated, while liposuction can be used as part of the contouring process. The procedures therefore have different functions within the same surgical plan.

Can liposuction treat cellulite?

Liposuction is not primarily a cellulite treatment. Cellulite involves the relationship between the skin, underlying fat and fibrous connective structures beneath the skin. Removing fat does not necessarily remove those structural changes.

In some people, cellulite may look different following body contouring. In others, it may remain visible or even become more noticeable.

For this reason, I would never recommend choosing liposuction with the expectation that it will eliminate cellulite.

How much fat can be removed?

For patient safety, the clinics I work with generally set a maximum of up to 5 litres of liposuction aspirate in one procedure.

However, this does not mean that every patient will, or should, have 5 litres removed.

The amount considered appropriate depends on your anatomy, overall health, the areas being treated, whether liposuction is being combined with other procedures and how your body responds during surgery.

The final decision is always made by the surgeon, with patient safety taking priority over the amount removed.

The goal of liposuction is not to remove the maximum possible volume of fat. It is to achieve a safe, proportionate and aesthetically balanced body contour.

What liposuction can and cannot do

I think this is one of the most important conversations to have before surgery.

Liposuction can reduce selected deposits of subcutaneous fat and change the contour and proportions of treated areas.

It cannot guarantee perfectly smooth skin, remove every fat cell, eliminate cellulite, remove significant excess skin or replace weight loss. And it cannot make every body look like somebody else's before-and-after photograph.

Your starting anatomy still matters.

Why two people can have very different results

Two patients can undergo liposuction of exactly the same areas and still achieve different results. Why? Because surgery begins with the body you already have.

Your bone structure, muscle anatomy, fat distribution, skin quality, skin elasticity, previous pregnancies, previous surgery and overall proportions all influence what can realistically be achieved.

This is why I always encourage clients to use before-and-after photographs as examples of a surgeon's work, not as a catalogue from which to choose somebody else's body.

Why consultation matters

When somebody contacts me asking for liposuction, one of the first things we need to establish is what they actually want to change.

Sometimes the problem is predominantly localised fat. Sometimes there is also loose skin. Sometimes the person is describing an area as "fat" when the underlying issue involves skin laxity, abdominal wall changes or a combination of different factors.

My role is to help you understand the available procedures, collect the information required for your surgical assessment and guide you through the proposed treatment plan.

The final decision about which procedure is appropriate, which areas can safely be treated and whether you are suitable for surgery belongs to your surgeon.