Cryolipolysis: Fat Freezing Method, Results and Costs

Cryolipolysis — also known as fat freezing or by the brand name CoolSculpting — is one of the most widely recognised non-invasive body contouring methods in modern aesthetic medicine. The procedure uses controlled cold to permanently destroy fat cells without damaging the surrounding skin, muscles or nerves. Since receiving FDA clearance, cryolipolysis has become an established alternative to surgical liposuction and is performed millions of times annually worldwide.

This guide explains the scientific principles behind cryolipolysis, describes the available applicators and treatable areas, sets realistic expectations for results and longevity, and provides a transparent overview of risks — including paradoxical adipose hyperplasia — and costs.

How Does Cryolipolysis Work?

The biological basis of cryolipolysis is the differential sensitivity of fat cells and skin cells to cold temperatures. Adipocytes (fat cells) begin to undergo apoptosis (programmed cell death) at temperatures between approximately -5°C and +5°C, while surrounding tissue — skin, nerves, blood vessels and muscle — remains unharmed at these temperatures.

During treatment, an applicator is placed on the target area and the tissue is drawn into the applicator by vacuum suction. The applicator then cools the tissue to the therapeutic temperature for a defined period (usually 35–60 minutes). In the weeks following treatment, the damaged fat cells are gradually removed by the body's natural immune processes (phagocytosis). The full result becomes visible 8–12 weeks after treatment.

Treatable Body Areas

Cryolipolysis can be used on numerous areas of the body:

Abdomen (upper and lower)
Flanks ("love handles")
Inner and outer thighs
Upper arms
Back rolls and bra fat
Under the chin (submental fat / double chin)
Knees (inner area)
Buttocks (banana roll)

Applicators and Technologies

Modern cryolipolysis systems offer a range of applicators tailored to different body areas:

Vacuum Applicators

The classic applicators draw tissue into a cup-shaped chamber by vacuum suction. Different cup sizes are available for large areas (abdomen, flanks) and smaller zones (inner thighs, arms). Dual-applicator systems allow two body areas to be treated simultaneously, reducing total treatment time.

Flat (Non-Vacuum) Applicators

For the chin, inner knees and smaller body contours, flat applicators that apply without vacuum are used. These allow precise cold application to anatomically challenging areas.

Results: Fat Reduction and Longevity

Clinical studies show an average fat layer reduction of 20–27% per treated area following one session. Individual results depend on the thickness of the fat layer, the area treated, the number of sessions and the applicator used.

The fat cells destroyed by cryolipolysis do not regenerate. If body weight remains stable, the result is permanent. However, existing fat cells in untreated areas can still enlarge with significant weight gain. Most patients require 1–3 sessions per area for satisfactory results.

Timeline of Results

Weeks 1–4: initial inflammatory reaction, slight firmness in treated area
Weeks 4–8: gradual visible reduction in the fat layer
Weeks 8–12: full result visible; skin adapts to the new contour
From 3 months: stable long-term result if weight is maintained

Cryolipolysis vs. Liposuction: A Direct Comparison

Criterion	Cryolipolysis	Liposuction
Invasiveness	Non-invasive	Surgical
Anaesthesia	None required	Local or general
Downtime	None to minimal	1–2 weeks
Fat reduction per session	20–27%	Up to 70–80%
Result visible	After 8–12 weeks	After 4–6 weeks
Scarring	None	Small access incisions
Best suited for	Localised fat deposits, body contouring	Larger volumes, significant fat reduction

Paradoxical Adipose Hyperplasia: The Rare But Serious Risk

The most significant specific risk of cryolipolysis is paradoxical adipose hyperplasia (PAH). In this rare complication, instead of shrinking, the treated fat tissue grows larger and becomes firmer. PAH typically manifests 2–5 months after treatment as a firm, painless enlargement in the exact shape of the applicator.

The incidence is estimated at approximately 0.033–0.39% per treated area (higher in men than women). The cause is not fully understood. PAH cannot resolve spontaneously and requires surgical liposuction for correction. This risk must be explicitly discussed in pre-treatment consultation.

Further Risks and Side Effects

Common, temporary side effects following cryolipolysis include:

Redness, swelling and bruising in the treated area (resolves within days to weeks)
Temporary numbness or altered sensation in the skin (may last several weeks)
Sensitivity to pressure and tenderness immediately after treatment
Temporary firmness in the fat layer (normal part of the inflammatory process)

Rare but documented complications include late-onset pain syndromes and, in very rare cases, skin changes at the treatment site. Treatment should only be performed by trained professionals.

Who Is Cryolipolysis Suitable For?

Cryolipolysis is suitable for adults with localised, pinchable fat deposits who are at or near their target weight and seek body contouring rather than significant volume reduction. It is not a weight loss treatment.

Contraindications include: cryoglobulinaemia, cold agglutinin disease, paroxysmal cold haemoglobinuria, Raynaud's phenomenon, open wounds or skin conditions in the treatment area, pregnancy and breastfeeding.

Costs of Cryolipolysis

Treatment Area	Approximate Cost
Single area (e.g. one flank)	from £300–£600
Abdomen (two applicators)	from £600–£1,200
Both flanks	from £500–£900
Chin (submental)	from £400–£700
Inner thighs (both)	from £600–£1,000
Full body contouring package	from £2,000–£4,000

Prices depend on the clinic, the device used, the number of applicators per session and the geographic location. As a purely aesthetic procedure, cryolipolysis is not covered by health insurance. A professional consultation to assess suitability is essential before booking treatment.