What Is Liposuction? How It Works, Types & What It Can (and Can't) Do

What Liposuction Is — and What It Isn't

Liposuction is a surgical body-contouring procedure that permanently removes localised deposits of subcutaneous fat from specific areas of the body. It has been performed in its modern form since the early 1980s and is now the most performed cosmetic surgical procedure globally, according to ISAPS annual survey data.

Understanding what liposuction cannot do is as important as understanding what it can:

• It is not a weight-loss procedure. The amount of fat removed is measured in litres, not kilograms of body weight. Most patients lose less than 1–3 kg of scale weight from liposuction alone. The visible difference is proportional reshaping, not significant mass reduction.
• It cannot remove visceral fat. Visceral fat surrounds the abdominal organs and lies too deep to be safely reached by a liposuction cannula. Patients with a protuberant abdomen caused primarily by visceral fat will see limited results.
• It does not tighten loose skin. Liposuction removes fat from beneath the skin but does not address skin laxity. Patients with significant loose skin may need a surgical lift procedure (arm lift, thigh lift, tummy tuck) in addition to or instead of liposuction.
• It is not a substitute for diet and exercise. Liposuction can address localised fat that resists lifestyle changes, but it does not address the metabolic factors that cause weight gain. Maintaining results requires weight stability post-operatively.

How Liposuction Works

The core mechanism of liposuction has remained consistent since its development: a thin, hollow metal tube (the cannula) is inserted through a small incision (3–5 mm) into the subcutaneous fat layer. The cannula is connected to a vacuum pump or large syringe, and the surgeon moves it in rapid back-and-forth fanning motions to break up and aspirate fat cells.

Tumescent Fluid

In modern practice, tumescent technique is used before cannula insertion. Large volumes of dilute saline solution containing lidocaine (local anaesthetic) and epinephrine (adrenaline) are injected into the fat. This:

• Numbs the area (reducing anaesthetic requirement)
• Constricts blood vessels (reducing blood loss and bruising)
• Firms the fat to allow more precise cannula movement
• Reduces post-operative pain duration

The StatPearls clinical review of liposuction technique and candidacy confirms that tumescent technique has dramatically improved the safety profile of liposuction since its introduction — transforming what was once a high-blood-loss inpatient procedure into a routine outpatient surgery.¹

Fat Removal and Incisions

Incisions are hidden in natural skin folds or crease lines where possible. Most are 3–5 mm — they rarely require more than one or two dissolvable sutures. The fat suctioned out is visible in the collection canister during surgery. A compression garment is applied immediately in the operating room.

Main Techniques at a Glance

All liposuction techniques share the same goal — removing subcutaneous fat through small incisions — but differ in how fat is disrupted before aspiration. The choice of technique depends on the surgeon's training, the area being treated, the fat volume, and whether skin tightening is a secondary goal.

Areas Commonly Treated

Liposuction can treat most body areas where subcutaneous fat accumulates. The most commonly treated areas, according to ASPS annual procedural data:²

• Abdomen — upper and lower, including the subumbilical pouch
• Flanks and love handles — the sides of the torso
• Thighs — inner and outer (saddlebags)
• Chin and neck — double chin, submental fat, jowl fat
• Arms — upper arm bat wing fat
• Back — bra rolls, lower back
• Male chest — pseudo-gynecomastia (fat, not glandular tissue)
• Knees, ankles, calves — possible but less common

The site-specific guides in our By Area section cover each area's specific candidacy criteria, technique preferences, and realistic expectations. Each technique is also explored in depth across our liposuction types resource centre.

Is Liposuction Permanent?

This is one of the most commonly misunderstood aspects of liposuction. The answer is nuanced:

The fat cell reduction is permanent. Adult humans have a fixed number of fat cells. Liposuction physically removes fat cells from the treated area — those cells do not regenerate. In that sense, the fat removed is gone permanently.

But remaining fat cells can still enlarge. Fat cells throughout the body — including some remaining in treated areas and all fat cells in untreated areas — can grow larger with caloric surplus and weight gain. Clinical experience and observational studies indicate that patients who gain significant weight after liposuction may see fat accumulate proportionally in areas that were not treated.

The practical takeaway: Liposuction results are long-lasting with weight stability. Most surgeons recommend remaining within 5–10 lbs of your surgical weight to preserve the contour long-term. Liposuction is not a cure for weight management — it is a shaping tool that works best in the context of a stable, healthy weight.

Who Is a Candidate?

The StatPearls evidence review of liposuction candidacy establishes the following as standard eligibility criteria:¹

• At or near target weight — BMI under 30 preferred; some surgeons consider up to 35 in selected cases
• Weight stable for ≥6 months — active weight loss and liposuction do not combine well
• Good skin elasticity — skin must retract after fat removal; laxity may require a lift procedure
• Localised, diet-resistant fat deposits — liposuction targets the fat that responds poorly to exercise and dietary change
• Non-smoker (or willing to stop ≥4 weeks before and after surgery)
• No serious medical conditions affecting healing, bleeding, or anaesthetic risk
• Realistic expectations about body contouring — not weight loss

Read our full liposuction candidacy guide for a detailed self-assessment and the questions to ask your surgeon at consultation.

Frequently Asked Questions

• What is liposuction?

  Liposuction is a surgical procedure that permanently removes localised deposits of subcutaneous fat through small incisions using a vacuum-connected hollow tube (cannula). It is a body-contouring technique for adults near their target weight — not a weight-loss treatment, and not effective for visceral fat or loose skin.

• Is liposuction permanent?

  Partially. The fat cells removed are gone permanently — they do not regenerate. However, remaining fat cells throughout the body can still enlarge with weight gain. Maintaining your weight within 5–10 lbs of your surgical weight is the key to preserving results long-term.

• How does liposuction work?

  A thin hollow tube (cannula) is inserted through a 3–5 mm incision. Before insertion, tumescent fluid (dilute anaesthetic + adrenaline) is injected to numb the area and reduce blood loss. The cannula is connected to a vacuum and moved in fanning motions to break up and suction out fat cells.

• What's the difference between liposuction and a tummy tuck?

  Liposuction removes fat; a tummy tuck (abdominoplasty) removes excess skin and can repair separated abdominal muscles. Liposuction cannot tighten loose skin. Patients with significant skin laxity — typically after major weight loss or multiple pregnancies — usually need a tummy tuck in addition to or instead of liposuction.

• How much weight will I lose with liposuction?

  Very little in terms of scale weight — typically 1–3 kg. Liposuction removes fat measured in litres, not significant body mass. The result is a change in body shape and proportion, not a meaningful reduction in total body weight. Patients who expect to see a significant drop on the scale will be disappointed.