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Berkshire Aesthetics is a CQC-registered medical aesthetic clinic in Maidenhead. All treatments begin with a consultation to assess suitability, medical history, risks and realistic outcomes.
What is PAH after CoolSculpting?
Paradoxical adipose hyperplasia, or PAH, is a rare complication of cryolipolysis in which the treated tissue gradually enlarges rather than reduces. Published series place it well below one per cent of treatment cycles, though reported rates vary between studies and reporting is thought to be incomplete. It typically becomes noticeable between two and nine months after treatment, appearing as a firm, well-demarcated swelling, often without tenderness, that follows the shape of the applicator used — which is what distinguishes it from general weight gain. PAH does not resolve spontaneously. Management is medically supervised and may include monitoring, structured assessment and onward referral for liposuction correction where appropriate. Outcomes vary by individual.
Book a consultationWhen this may help
- You have noticed an enlarging, well-defined area in a previously treated cryolipolysis zone.
- You want assessment from a clinician with specific CoolSculpting complications experience.
- You want to understand realistic management options before deciding next steps.
When this may not be suitable
- Your concern is generalised weight gain rather than a discrete enlarging area.
- You are looking for a guaranteed same-day correction without assessment.
- You need urgent care for an unrelated acute medical problem.
Risks and limitations
- PAH does not resolve on its own and may need surgical correction such as liposuction.
- Delaying assessment can make the area harder to treat aesthetically.
- Surgical correction carries its own anaesthetic, bruising, swelling and scarring risks.
- Outcomes after correction vary by individual.
What we assess in consultation
- History of original cryolipolysis treatment and timeline of change
- Examination of the affected area and comparison with surrounding tissue
- Discussion of monitoring, correction options and onward referral
- Honest conversation about expectations and what correction can achieve
Related treatments
Useful starting points
Related questions
What is paradoxical adipose hyperplasia?
Paradoxical adipose hyperplasia is a recognised complication of cryolipolysis in which fat cells in the treated area increase rather than reduce, producing a firm enlargement of the treated zone. The mechanism is not fully established in the literature.
How common is PAH after CoolSculpting?
Published series report PAH in well under one per cent of cryolipolysis cycles, although reported rates differ between studies and the true figure is uncertain because the complication is thought to be under-reported.
What does PAH look like?
PAH usually presents as a firm, well-demarcated area of enlargement, often without tenderness, that mirrors the shape of the applicator used, becoming visible some months after treatment. Any change in a previously treated area should be assessed clinically rather than self-diagnosed from photographs.
When does PAH usually appear?
PAH typically becomes noticeable between two and nine months after cryolipolysis treatment, although timing varies between individuals.
Does PAH resolve on its own?
No. Paradoxical adipose hyperplasia does not resolve spontaneously and usually needs clinical assessment with consideration of surgical correction such as liposuction.
Can PAH be corrected?
Correction is usually surgical, most often liposuction, and is generally considered once the area has stabilised. Suitability, timing and what correction can realistically achieve are assessed individually.
Why see a CoolSculpting Complications Expert?
Specific experience with cryolipolysis complications supports accurate diagnosis, realistic discussion of correction and structured onward referral when needed.
Start With a Medical Consultation
Every treatment begins with a face-to-face assessment with our clinical team.