Rejuva London Harley Street
Rejuva London Harley Street
Ultherapy Vs Thermage Jowls Neck Laxity

Ultherapy vs. Thermage FLX: Which is Best for Jowls and Neck Laxity?

Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice. Please consult with a qualified medical professional for personalized assessment and treatment recommendations.

Medical Review: This article has been medically reviewed and approved by Dr. Kristy Lau.

Apr 24, 2026

Apr 24, 2026

Ultherapy Vs Thermage for Jowls: Non-surgical Jawline & Neck Tightening

Understanding ultherapy vs thermage for jowls is crucial for addressing lower face and neck laxity. Ultherapy uses micro-focused ultrasound to target the deep SMAS layer, providing a lifting effect for sagging jowls and jawline definition. Thermage FLX employs radiofrequency energy to heat dermal collagen, resulting in broader skin tightening and improved neck laxity. Both stimulate collagen production, but their distinct mechanisms and target depths make them suitable for different concerns, offering effective non-surgical skin tightening solutions.

Rejuva London provides doctor-led insights into these advanced aesthetic treatments. Our expertise ensures informed decisions for personalized lower face rejuvenation plans.

To explore your options, contact us to schedule your consultation. You can also reach us via: Book a Clinic Consultation, Contact Us via WhatsApp (+44 7415972345)

Choosing between ultherapy vs thermage for jowls requires understanding how each technology addresses skin laxity. Sagging jawlines and neck looseness are signs of ageing caused by collagen depletion and weakening skin structures. This guide examines the mechanisms and applications of Ultherapy and Thermage FLX for lower face rejuvenation, based on doctor-led insights from our Harley Street clinic.

Ultherapy vs. Thermage FLX: Understanding the Core Technologies

The primary difference between Ultherapy and Thermage FLX is their energy source and target depth. Ultherapy uses micro-focused ultrasound to deliver energy to the deep foundational SMAS layer for a lifting effect, making it effective for jowls. Thermage FLX uses radiofrequency energy to generate bulk heat in the dermis, tightening existing collagen and stimulating new growth for skin smoothing, which is ideal for neck laxity.

How Ultherapy Lifts Jowls and Defines the Jawline

Ultherapy uses micro-focused ultrasound with visualization (MFU-V) to target deep structural tissues. It reaches the Superficial Muscular Aponeurotic System (SMAS)—the same layer addressed in a surgical facelift. By creating thermal coagulation points at specific depths (up to 4.5mm), Ultherapy initiates neocollagenesis. This new collagen stimulation results in a gradual lift over several months, counteracting jowl sagging and restoring a defined jawline.

Thermage FLX for Neck Laxity and Overall Skin Tightening

Thermage FLX uses patented monopolar radiofrequency (RF) technology. It delivers controlled heat across a large volume of tissue, targeting collagen-rich dermal layers. This volumetric heating causes immediate collagen contraction for an initial tightening effect and triggers a long-term collagen remodeling process. It is effective for treating diffuse skin laxity and improving crepey neck texture, resulting in smoother, firmer skin.

Key Differences: Ultherapy vs. Thermage FLX for Lower Face & Neck

The practical distinctions between these treatments determine the best option for a non-surgical jowl lift or neck laxity. The choice depends on the primary goal: a deep, structural lift or broader skin surface tightening.

Ultherapy vs. Thermage FLX: Understanding the Core Technologies — Ultherapy vs. Thermage FLX: Which is Best for Jowls and Neck Laxity?
Comparison of the core features of Ultherapy and Thermage FLX for lower face and neck rejuvenation.

Target Depth and Energy Delivery: SMAS vs. Dermis

The key differentiator is the depth of energy delivery. Ultherapy’s precision bypasses the skin’s surface to focus energy on the SMAS layer, which produces a tangible lift. Thermage FLX delivers broader, less focused energy, heating the dermal matrix. This volumetric heating remodels collagen over a wider area, improving skin quality and texture but providing less of a vector-based lift than Ultherapy.

Treatment Experience, Results, and Downtime Compared

Both treatments are completed in a single session with minimal to no downtime. Patients may experience temporary redness or mild swelling. The sensation during Ultherapy is described as brief, intermittent feelings of heat and tingling, while Thermage FLX involves a deep heating sensation alternating with cooling bursts. Results for both emerge gradually over three to six months as the body produces new collagen. The longevity of results depends on the individual’s ageing process and lifestyle.

Which Treatment is Best for Your Jowls and Neck Laxity?

The optimal choice between Ultherapy and Thermage FLX depends on which technology best suits your anatomical needs and aesthetic goals. A medical assessment is essential to determine the most effective treatment plan, which may involve a combination of therapies.

When Ultherapy Excels for Jowl Lifting and Jawline Definition

Ultherapy is preferred for patients with moderate skin laxity whose primary concern is sagging jowls and loss of jawline definition. For a visible lift to counteract gravity, Ultherapy’s ability to target the deep SMAS layer provides an advantage. It is considered the gold standard for a non-surgical jowl lift because it addresses the foundational cause of sagging.

Optimizing Thermage FLX for Neck Tightening and Skin Texture

Thermage FLX is for individuals whose main concern is crepey skin texture, fine lines, and mild to moderate neck laxity (“turkey neck”). Its volumetric heating tightens and smooths the skin’s surface, improving quality and resilience. While it provides some tightening, it is less focused on lifting, making it ideal for patients wanting a smoother neck and improved skin firmness.

Which Treatment is Best for Your Jowls and Neck Laxity? — Ultherapy vs. Thermage FLX: Which is Best for Jowls and Neck Laxity?
Comparison of typical treatment timelines and outcomes for Ultherapy and Thermage FLX.

The Rejuva London Difference: Doctor-Led Expertise for Optimal Results

Safe, natural-looking results from energy devices require medical expertise. At Rejuva London, every treatment is performed by a doctor, ensuring safety and precision for areas like the jowls and neck.

Precision and Safety: Why Doctor-Led Treatment Matters

The anatomy of the lower face and neck is complex. A doctor’s understanding of this anatomy, like that of our founder Dr. Kristy Lau (Imperial College London), is critical for delivering energy precisely while avoiding sensitive structures. This medical oversight, backed by over 10,000 clinical cases, minimizes risks and ensures the treatment is safe and effective, unlike settings where non-medical personnel may operate such devices.

Personalized Treatment Plans with VISIA Skin Analysis

Before any procedure, we use diagnostic tools like VISIA Skin Analysis for an objective assessment of skin laxity, texture, and health. Quantitative analysis, as documented in the Journal of Clinical and Aesthetic Dermatology, allows for more precise treatment planning. This data enables our doctors to create a personalized treatment plan, determining if Ultherapy’s deep lift or Thermage FLX’s broad tightening is best suited to your skin condition.

What to Expect: Results, Recovery, and Longevity for Jowls & Neck

Both Ultherapy and Thermage FLX rely on the body’s natural collagen-building process, so results appear gradually and look natural.

Timeline of Results and Post-Treatment Care

After a session, mild redness, swelling, or tenderness may occur, resolving within a few hours to a couple of days. There is no significant downtime, and normal activities can be resumed immediately. Some patients notice initial tightening, but full results from collagen remodeling become apparent over two to six months. Dermatological research on neocollagenesis confirms this timeline. Post-treatment care involves maintaining a good skincare routine and applying broad-spectrum sunscreen daily.

Maintaining Your Rejuvenated Jawline and Neck

Results from a single treatment can last over a year, sometimes up to two years or more. To prolong the benefits, a medical-grade skincare regimen and sun protection are recommended to prevent collagen degradation. A maintenance session every 18-24 months can help sustain results, depending on your ageing process. These procedures can be complemented by other anti-ageing treatments for comprehensive rejuvenation. Our guide to non-surgical skin tightening provides further insights.

Begin Your Journey to a Firmer Jawline and Neck at Rejuva London

The first step is a consultation. At our Harley Street clinic, we provide an assessment to create a tailored treatment plan. We help you choose between ultherapy vs thermage for jowls and neck laxity with medical precision.

Schedule Your Expert Consultation Today

During your consultation, our doctors will evaluate your skin, discuss your aesthetic goals, and recommend a treatment path. Our multi-lingual team serves local and international patients in London’s medical district. Book a Clinic Consultation or contact us via WhatsApp (+44 7415972345).

Conclusion

Choosing between Ultherapy and Thermage FLX for jowls and neck laxity depends on your primary aesthetic goal. Ultherapy offers a superior lift for sagging jowls by targeting the deep SMAS layer, while Thermage FLX excels at tightening and smoothing crepey neck skin. The most effective approach is determined by a medical assessment of your skin structure and laxity. A doctor-led consultation ensures a safe, effective, and personalized treatment for natural-looking, long-lasting results. To explore your options, contact us at Rejuva London. Book a Clinic Consultation or contact us on WhatsApp (+44 7415972345).

Frequently Asked Questions

In the debate of ultherapy vs thermage for jowls, which provides a better lift?

For significant jowl lifting, Ultherapy is generally the superior choice. It uses micro-focused ultrasound to target the deep SMAS layer, the same foundational layer addressed in a surgical facelift. This provides a noticeable lift to the lower face and jawline, making it highly effective for structural sagging.

How does Thermage FLX address neck laxity when considering ultherapy vs thermage for jowls?

Thermage FLX is highly effective for improving the texture and crepiness of neck skin. It uses radiofrequency to generate bulk heat in the collagen-rich layers, causing them to contract and remodel. This results in smoother, tighter skin on the neck, addressing laxity and what is often called “turkey neck.”

How do I decide on ultherapy vs thermage for jowls based on my skin type?

The decision on ultherapy vs thermage for jowls depends on your specific anatomy and primary concern. If you have significant sagging and loss of structural support (heavy jowls), Ultherapy’s deep lifting is ideal. If your main issue is thinner, crepey skin with more surface-level laxity, Thermage’s collagen-remodeling properties may be more suitable.

Can I combine treatments to address both jowls and neck laxity?

Yes, our doctors at Rejuva London often devise combination treatment plans for a comprehensive result. We might use Ultherapy to lift the jowls and Thermage to tighten the neck skin. This dual approach addresses both structural sagging and surface texture for a natural-looking rejuvenation.

Are the results from these jowl and neck treatments permanent?

The results are long-lasting but not permanent, as the natural ageing process continues. The new collagen your body produces can last for years, but we typically recommend a maintenance treatment every 12-24 months. This helps you stay ahead of the ageing curve and maintain your rejuvenated appearance.

How can I get a professional opinion on ultherapy vs thermage for jowls at your clinic?

The best way to know for sure is through a professional assessment. At our Harley Street clinic, our doctors use data-driven VISIA Skin Analysis to evaluate your skin’s structure and determine the optimal treatment plan. To understand the best approach for your specific needs regarding ultherapy vs thermage for jowls, you can book a clinic consultation with our expert team.

Dr. Kristy Lau, Medical Director of Rejuva London

Dr. Kristy Lau

Medical Director & Founder

Aesthetic Clinic London

MBBS Imperial College London
GMC Registered
30+ Years Medical Experience

Dr. Kristy Lau is the founder and Medical Director of

Rejuva London Clinic
, an

Imperial College London

graduate with over 10 years of comprehensive medical expertise. Specializing in dermatology and medical aesthetics, Dr. Lau combines rigorous medical training with advanced aesthetic technologies to deliver personalized, natural-looking treatments.

At Rejuva London’s prestigious Harley Street location, Dr. Lau ensures all procedures are performed exclusively by highly experienced doctors, maintaining the highest standards of safety and excellence in aesthetic medicine. Her doctor-led approach has successfully treated over 20,000 clients since establishing the clinic in 2018.

Medical Specializations:

Injectable Treatments
  • Anti-wrinkle Injections (Botox)
  • Dermal Fillers
  • Facial Contouring
Advanced Technologies
  • Picosure Pro Laser
  • Thermage RF
  • Ultherapy
Medical Dermatology
  • Skin Health Assessment
  • Medical Aesthetics
  • Laser Skin Treatments

Professional Qualifications & Credentials:

  • Medical Degree
    MBBS, Imperial College London
  • Professional Registration
    GMC Registered Medical Practitioner
  • Specialization
    General Practice (GP) Certification
  • Advanced Training
    Dermatology & Aesthetic Medicine Specialization

About Rejuva London

Established in on prestigious Harley Street,
Rejuva London has served over 20,000 clients through our doctor-led approach to aesthetic medicine.

Aesthetic Clinic London:
15 Harley Street
London
W1G 9QQ
United Kingdom

20,000+Clients Treated
6+Years of Excellence
100%Doctor-Led

Treatment Philosophy:

“My approach to aesthetic medicine centers on enhancing natural beauty while prioritizing patient safety.
Every treatment at Rejuva London is tailored to the individual, combining medical expertise with artistic
vision to achieve results that look naturally refreshed, never overdone.”
– Dr. Kristy Lau

Professional Memberships & Affiliations:

  • General Medical Council (GMC)
  • British College of Aesthetic Medicine
  • British Association of Cosmetic Doctors

Consult with Dr. Lau in Aesthetic Clinic in London:

Experience the Rejuva London difference with a personalized consultation