HIFU, Ultherapy and Thermage all heat tissue so that collagen contracts and remodels, but they heat different layers in different ways. HIFU focuses ultrasound into small points at set depths, down to the SMAS. Ultherapy is a HIFU brand that images the tissue first. Thermage heats the dermis in bulk with monopolar radiofrequency. The layer at fault decides.
- HIFU
- Focused ultrasound converging to points of roughly 60–70 °C at set depths; the 4.5 mm cartridge reaches the SMAS.
- Ultherapy Prime
- The same principle, with imaging of the layers before each line.
- Thermage FLX
- Monopolar radiofrequency at 6.78 MHz, heating the deep dermis as a volume, with no focal points.
- How Dr Sin Yong chooses
- By which layer has let go. He performs all three. The treatment itself is on HIFU in Singapore.
HIFU vs Ultherapy vs Thermage: three mechanisms compared
HIFU vs Ultherapy vs Thermage is a question of mechanism, not brand. All three heat tissue so that collagen contracts and then remodels. They differ in the energy, the layer it reaches, the shape of the heat and whether the doctor sees the tissue first.
| HIFU (Ultraformer MPT) | Ultherapy Prime | Thermage FLX | |
|---|---|---|---|
| Energy | Focused ultrasound, laid in micro-pulsed lines | Focused ultrasound with imaging | Monopolar radiofrequency at 6.78 MHz, surface cooled |
| Heat | Discrete points; the tissue between is spared | Discrete points, planned to the image | A volume of dermis, heated in bulk |
| Depth | 1.5, 2.0, 3.0 and 4.5 mm; 4.5 mm reaches the SMAS | 1.5, 3.0 and 4.5 mm; 4.5 mm reaches the SMAS | Deep dermis and septa, to roughly 4.3 mm |
| Imaging | None; depth judged by palpation | Shows the layers before each line | None; energy tuned to your feedback |
| Tends to suit | Early laxity of the jawline, under the chin and the neck | The same, where tissue is thin or depth uncertain | Crepey, loosely draped skin, including the eyelids |
| Cannot do | Add volume or take up heavy skin excess | The same | Lift a descended SMAS or add volume |
HIFU and Ultherapy share the physics: both converge ultrasound to a point the size of a rice grain. They differ in imaging, transducer design and clearance, as Ultherapy vs HIFU in Singapore sets out. Thermage, like Volnewmer in the diagram, passes an electrical field through the dermis, and resistance turns it into heat across a volume, so it conditions the skin envelope rather than the SMAS. That is why the two are often combined rather than chosen between; see Ultherapy vs Thermage.
Which layer has let go?
- The SMAS has descended: jowling, cheek descent, a softened jawline. Focused ultrasound at 4.5 mm reaches it.
- The dermis has thinned: crepey skin that folds easily. Bulk radiofrequency or RF microneedling is directed at it.
- Volume has gone: a hollow temple or flat midface. Heat does not put volume back, and tightening a deflated face can deflate it further.
- The surface has changed: pigment, pores and fine lines, the territory of resurfacing lasers and needling.
Most faces show more than one, so a plan is often a sequence. The wider map by layer is on the skin tightening treatment guide and sagging face treatment.
Which HIFU to choose: Ultraformer MPT, Ultherapy Prime, other platforms and 4D or 7D labels
The type of HIFU matters less than whether its depths match the layer that has changed. Devices differ in transducer depths, in how energy is laid along each line and in whether the tissue is imaged first. Dr Sin Yong performs both the Ultraformer MPT and Ultherapy Prime, and the assessment decides between them.
| Option | Depths and imaging | Where it tends to fit |
|---|---|---|
| Ultraformer MPT (CLASSYS) | Face cartridges at 1.5, 2.0, 3.0 and 4.5 mm, body cartridges at 6, 9 and 13 mm; micro-pulsed lines; no imaging | Jawline, under the chin and the neck, where depth can be judged by palpation |
| Ultherapy Prime (Merz) | 1.5, 3.0 and 4.5 mm, imaging to about 8 mm before each line; US FDA 510(k) clearances for brow, neck and under-chin lifting | A thin temple, an uncertain SMAS depth or a face treated before |
| Shurink, Doublo and other Korean platforms | Set by cartridge, varying by maker; usually no imaging | Judged device by device; Shurink is not offered here |
| 4D, 7D or 12D HIFU | A maker's count of cartridges or modes, not a depth or a generation | Cannot be judged until the device is named |
| Salon or home units | Non-medical units; depth, energy and oversight differ | Not a substitute for a medical device after an examination |
Shot counts mislead for the same reason: a shot is a unit of the device, not of treatment, as HIFU shots explained sets out. Ask which device it is, whether it is on the Health Sciences Authority register, which depths go where, whether the tissue is imaged, and who sets the energy. With a salon or home unit, no doctor examines the layers or manages a burn or nerve weakness. The checks are listed on the HIFU suitability and type guide and home HIFU device safety, and the three platforms side by side on Ultherapy Prime vs Ultraformer MPT vs Shurink.
HIFU vs radiofrequency and other lifting options
HIFU or radiofrequency is the wrong question, because they do different jobs. Focused ultrasound places points in the SMAS and deep dermis; radiofrequency heats a volume of dermis; a laser heats the dermis and, in some protocols, the fat beneath; threads and threadless protocols re-support tissue without heat.
| Option | How it works | Tends to suit | Cannot do |
|---|---|---|---|
| Thermage FLX | Monopolar radiofrequency heating the deep dermis in bulk | Crepey skin on the face, eyelids, neck or body | Reach the SMAS |
| VF Lift – Vertical Facelift | Dr Sin Yong's protocol on Volnewmer monopolar radiofrequency, zone by zone along vertical vectors, to lift, reduce puffiness or restore support; no focused ultrasound | Lean faces; laxity with fullness or hollowing | Replace surgery for heavy laxity |
| RF microneedling (Secret DUO) | Insulated needles release radiofrequency inside the dermis at a set depth | Crepey neck skin, texture, pores, shallow scars | Lift a descended SMAS |
| Time Freeze Laser LCLR® | Dr Sin Yong's protocol on a long-pulsed 755 nm and 1064 nm laser, with a Sculpting mode for sagged fat | Laxity with compact fat, or excess from earlier filler | Add volume to a hollow face |
| Bliss Lift thread lift | Absorbable cog threads reposition descended tissue | Early jowling where the skin is still elastic | Add volume or remove skin |
| RVR ProLift | Dr Sin Yong's threadless thread lift: collagen-stimulating agents placed by fine needle along mapped vertical vectors, with no threads and no energy | Mild to moderate descent at the nasolabial folds, jowls or outer eye corners | Replace surgery where descent is marked |
Many faces need more than one, in sequence: two energies for two layers are planned on HIFU with VF Lift – Vertical Facelift, threads beside ultrasound are compared on thread lift vs HIFU, and the energies at length on HIFU vs radiofrequency. Heavy skin excess is referred to a plastic surgery specialist.
Sofwave and titanium lifting are not offered here; for the same aims Dr Sin Yong uses the VF Lift – Vertical Facelift and Time Freeze Laser LCLR®. Oligio is not offered either; he prefers the same two, or Thermage FLX where it suits. Nor is Sylfirm X: RF microneedling here uses Secret RF, on its Secret DUO platform.
HIFU vs Ultherapy vs Thermage by face type, and who should wait
All three tighten; none adds support, and that is what separates a sound choice from a poor one on a lean face. Age matters less than anatomy.
| Face type | HIFU or Ultherapy | Thermage FLX | Often considered instead or as well |
|---|---|---|---|
| Slim or lean, early laxity | Used cautiously; deep energy over thin tissue can read as hollowing | Tightens the dermis, but adds no support | VF Lift – Vertical Facelift, which can restore support |
| Average volume, mild to moderate laxity | Suits SMAS laxity of the lower face and neck | Suits crepey dermis, including around the eyes | A staged combination of the two |
| Fuller or puffy lower face | Tightens but does not reduce heaviness | Firms the skin over the fullness | Time Freeze Laser LCLR®, where excess is the problem |
| Heaviness from earlier filler | Not the first step | Not the first step | Ultrasound mapping, then filler correction |
| Heavy jowls, folds of loose skin | Beyond its reach | Beyond its reach | A surgical opinion |
A lean face tightened without support can look more hollow, and tightening skin over heaviness does not remove it. Face shapes are compared at length on Volnewmer vs Ultherapy vs Thermage.
Who should wait, or be assessed first
- Pregnancy, or active infection, open wounds or inflamed acne in the area: treatment waits.
- A pacemaker or other implanted electronic device, or metal implants in the field: reviewed first, monopolar radiofrequency in particular.
- Recent filler or threads in the treatment plane: timed around, not treated over.
- A keloid tendency, which is usually not a reason to hold off Ultherapy but is assessed first.
What HIFU, Ultherapy and Thermage cannot do, and the alternatives
None of the three adds volume, removes fat or skin, or replaces a surgical facelift. They tighten what is there.
| Concern | Why they fall short | What is assessed instead |
|---|---|---|
| Hollow cheeks or temples | Heat adds nothing; in a thin face it can read as further hollowing | Volume restoration, or RVR ProLift where deeper support is missing |
| Heavy skin excess and deep jowls | Contraction has a ceiling set by the excess | A thread lift while the skin is elastic; otherwise a plastic surgery referral |
| A full double chin or fatty jowl | The heaviness is fat, not laxity | Fat-directed options, or Time Freeze Laser LCLR® for compact fat |
| Crepey eyelid and under-eye skin | Focused ultrasound stays at superficial depths inside the orbital rim, so its reach there is limited | FSX, Dr Sin Yong's preferred treatment for laxity and wrinkles here; he also uses fractional CO2 (Tetra Pro), RF microneedling and the Thermage eye tip; see under-eye lines |
| Pigment, pores and fine lines | These sit in the epidermis and upper dermis | Resurfacing or needling, after a pigment diagnosis |
| Movement lines | They come from muscle, not laxity | Anti-wrinkle injections |
“HIFU tightens the layer it reaches. It does not put back the volume the face has lost.”
Dr Sin YongOn why a lifting device is the wrong answer to a hollow face
Risks compared: HIFU, Ultherapy and Thermage
All three are thermal, so their risks follow from heat. Redness, warmth, tenderness and mild swelling are expected and usually settle. What differs is where misplaced heat lands.
| Risk | HIFU and Ultherapy | Thermage FLX |
|---|---|---|
| Surface injury | A welt, blister or burn if coupling is poor or the focus too superficial | A blister, crust or small burn where heat builds in one spot |
| Nerves | Temporary weakness of a facial movement if heat reaches a nerve branch, usually along the jaw or above the brow | A patch of altered sensation |
| Contour | Fat loss that reads as hollowing when a lean face is over-treated | A dent where fat beneath thin skin is over-heated |
| How it is reduced | Depth palpated zone by zone, 4.5 mm kept to areas with enough tissue, the thyroid, orbital rim and nerve course avoided | Lower energy in several passes, tuned to what you feel, with the surface cooled |
In darker skin, any surface injury can be followed by temporary pigment change. Contact the clinic the same day for blistering, increasing pain, a change in contour, or numbness or weakness that is not settling. See HIFU gone wrong, Ultherapy side effects and complication care.
What to expect, and what decides the cost
The treatment itself is set out on HIFU in Singapore. In brief: the face is examined first, and if laxity is not the main problem, none of the three is advised; there is no HIFU trial. On the day, focused ultrasound is delivered line by line through a gel, felt as brief deep heat, stronger over bone; Thermage passes a cooled tip over the skin, with energy tuned to what you feel. The skin is not broken, and the response is read at a planned review, since collagen remodels gradually.
Fees are not published on this site. The fee follows the plan: the device, the zones, the depths and lines the assessment calls for, one energy or a staged combination, and the single-use cartridges or tip. Two quotes describe different treatments unless device, depths and line count match. See what decides HIFU and Ultherapy cost, what to expect at a HIFU visit and HIFU aftercare.
How Dr Sin Yong chooses between HIFU, Ultherapy and Thermage
Dr Sin Yong assesses and performs every treatment himself. He maps where the SMAS is lax against where the dermis has thinned, where volume is missing and where fat sits, and that map decides the mechanism. Because he performs the Ultraformer MPT, Ultherapy Prime, Thermage FLX, the VF Lift – Vertical Facelift, Time Freeze Laser LCLR®, the Bliss Lift and RVR ProLift, the recommendation follows the anatomy rather than the device in the room.
Focal ultrasound is chosen for a defined deep layer, and bulk radiofrequency for skin that has lost its recoil. In a lean face he favours the VF Lift – Vertical Facelift; in a puffy or heavier face he considers Time Freeze Laser LCLR®. An overfilled face starts with filler correction, mapped with ultrasound, before any lifting.
He is a Global Key Opinion Leader for device makers including CLASSYS, which makes the Ultraformer MPT and Volnewmer, and is invited to share his clinical expertise internationally. The written plan states which mechanism was chosen and why the others were set aside, and a consultation can end with no treatment advised.
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All treatments performed personally by Dr Sin Yong on Orchard Road, Singapore.
WhatsApp +65 8023 7170HIFU vs Ultherapy vs Thermage: Frequently Asked Questions
HIFU and Ultherapy are both focused ultrasound: they place discrete thermal points at set depths, 4.5 mm for the SMAS and 3.0 or 1.5 mm for the dermis, and Ultherapy images the layers first. Thermage is monopolar radiofrequency at 6.78 MHz that heats the deep dermis as a volume, without focal points, so it does not reach the SMAS.
HIFU is the technology; Ultherapy is one HIFU brand, made by Merz. Ultherapy Prime images the tissue before each line and holds US FDA 510(k) clearances for lifting the brow, neck and under-chin. The Ultraformer MPT adds a 2.0 mm cartridge and micro-pulsed delivery. Dr Sin Yong performs both and chooses at assessment.
No. Thermage FLX uses monopolar radiofrequency to heat the dermis in bulk and is directed at the skin envelope. HIFU focuses ultrasound into discrete points and reaches the SMAS at about 4.5 mm. Different mechanisms on different layers are often combined in a staged plan rather than chosen between.
HIFU and Ultherapy do not suit a thin, volume-depleted face, where deep points risk further fat loss, or heavy skin excess, which is a surgical question. Thermage is not directed at SMAS descent. None replaces lost volume or treats pigment, and all are usually deferred in pregnancy, with infection in the area or with an implanted electronic device.
Usually it is not the right tool. At 4.5 mm the energy passes through the fat to the SMAS, and where fat is already scarce the risk is further loss and a hollower look. Volume or support is addressed first, or a radiofrequency protocol such as the VF Lift – Vertical Facelift is considered instead.
Yes, and it often is. HIFU addresses the SMAS, monopolar radiofrequency the dermis, and filler or a collagen stimulator the volume. Dr Sin Yong's VF Lift – Vertical Facelift runs on Volnewmer radiofrequency and does not use focused ultrasound. Which layer comes first, and how the plan is staged, is decided at consultation.
No. A surgical facelift repositions the SMAS and removes surplus skin through incisions; HIFU heats the SMAS so that it contracts and remodels, and removes nothing. Where skin excess is heavy, tightening cannot take it up. HIFU is directed at mild to moderate laxity with enough fat over the SMAS to protect it.
References
- Systematic Review of High-Intensity Focused Ultrasound in Skin Tightening and Body Contouring. Aesthetic Surgery Journal.
- Ulthera System 510(k) K072505. U.S. FDA 510(k) Premarket Notification database.
- Treatment of Facial Skin Laxity by a New Monopolar Radiofrequency Device. Journal of Cutaneous and Aesthetic Surgery (PMC).
- Consensus Recommendations for Combined Aesthetic Interventions Using Botulinum Toxin, Fillers, and Energy-Based Devices. Dermatologic Surgery (PubMed).
- HIFU Singapore: the treatment, how it is planned and what decides the fee
- Ultherapy vs HIFU Singapore: brand versus category
- Thermage vs HIFU vs Volnewmer: which energy for which face
- Before booking HIFU: seven questions to ask
- Non-surgical facelift guide: every option by mechanism, and when surgery is the answer
Medically reviewed by Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh) · Last updated 25 October 2026 · Editorial policy