A sagging face can come from loose skin, descended fat, lost volume or all three. Dr Sin Yong explains how threads, focused ultrasound and filler each address a different part of the problem at IN Eternity Clinic on Orchard Road.
WhatsApp to Enquire →Key facts ↓Threads physically reposition descended tissue with absorbable sutures and give an immediate lift. HIFU heats the SMAS and dermis to tighten gradually over two to three months, without needles. Filler restores lost volume and support, which can lift indirectly. Which suits you depends on whether the sagging comes from laxity, descent or volume loss.
Sagging is often described as skin dropping, but skin is only one layer. With age, the skin loses elastic fibres and collagen. The fat compartments of the face, which sit in distinct pads separated by thin partitions, shrink in some places and slide downwards in others. The ligaments that hold soft tissue to bone stretch. The bone itself slowly resorbs, particularly around the eye sockets and jaw, so there is less scaffolding underneath.
The result is the familiar pattern: a flatter mid-cheek, a deeper fold from nose to mouth, jowls along the jawline and a softer neck. But the proportion of each cause differs between people. Someone with heavy, full tissue may mostly have descent; someone with a thin face may mostly have volume loss that only looks like sagging. Choosing between threads, focused ultrasound and filler depends on which of these is doing most of the work.
Threads are absorbable sutures made of materials such as polydioxanone (PDO) or polycaprolactone (PCL). Barbed or coned threads are passed under the skin through small entry points with a blunt cannula, then the tissue is gently moved upwards and the barbs hold it in its new position. As the threads dissolve over months, a collagen response forms around them, which helps support the tissue after the threads themselves are gone.
At IN Eternity Clinic, thread lifting is done as the Bliss Lift, Dr Sin Yong’s protocol using PDO and PCL threads. The change is visible on the day, which suits people who want repositioning they can see quickly. The trade-offs are the procedure itself (local anaesthetic, entry points), a few days of swelling, tightness or puckering, and a duration limited by how long the threads and their collagen response last. Reviews of the literature note that results vary and are temporary.
“Before I lift anything, I ask whether it has fallen or whether the support underneath has gone. The answer decides between threads, heat and filler.”
High-intensity focused ultrasound places small points of heat at set depths under the skin without breaking the surface. At about 4.5 mm it reaches the SMAS, the fibrous layer that a surgical facelift repositions; at shallower depths it treats the dermis. The heat contracts collagen and triggers remodelling over two to three months, tightening and slightly lifting the tissue.
At IN Eternity Clinic, HIFU is done with Ultraformer MPT, and Ultherapy Prime is also offered where real-time imaging of the layers is wanted. HIFU suits early descent along the jawline, a heavy brow or a softening under the chin, in people with reasonable skin thickness. There are no entry points, recovery is usually limited to mild tenderness or swelling, and the change is gradual. It does not add volume, and in very thin faces deep heat can make hollows more visible, so it is used conservatively there.
Filler does not pull tissue upwards. It restores lost volume and structure at key support points, and in doing so can lift the tissue around them. Small amounts placed deep along the cheekbone, at the chin or at the jaw angle can support the mid-face and sharpen the jawline, making jowls and folds less prominent. Hyaluronic acid filler can be dissolved with hyaluronidase if needed; collagen stimulators such as calcium hydroxylapatite or polycaprolactone cannot.
The risk with filler for sagging is chasing the fold. Filling the nasolabial fold or the jowl directly, rather than restoring the support above it, adds weight where the face is already heavy and can make it look wider and older. Vascular complications are rare but serious with any filler, which is why anatomy, technique and an emergency plan matter.
| Thread lift | HIFU | Filler | |
|---|---|---|---|
| What it does | Repositions tissue | Tightens SMAS and dermis | Restores volume and support |
| When change shows | Same day | Over two to three months | Same day |
| Recovery | Swelling, tightness for days | Mild tenderness | Swelling, possible bruising |
| Suits | Moderate descent, good skin | Early laxity, jawline, brow | Volume loss, weak support |
| Reversible | Dissolves over months | No | HA filler, yes |
Many plans combine two or three, sequenced so each step can be assessed.
Assessment is done at rest and with expression, from the front and the side, and often with older photographs for comparison. If tissue has descended but volume is reasonably preserved, threads or HIFU are considered, depending on how much movement is needed and how much recovery is acceptable. If the face has thinned and lost support, restoring structure with a small amount of filler often does more than any lifting treatment. Laxity of the skin itself may call for heat-based treatment, including radiofrequency options such as VF Lift – Vertical Facelift on Volnewmer.
Order matters. Volume is often restored first so that lifting treatments act on a supported face, and heat-based treatments are timed around injectables. Where the problem is heavy jowls with marked skin excess, none of these is a substitute for surgery, and Dr Sin Yong will say so.
Threads are placed under local anaesthetic; the procedure is felt as pressure and tugging rather than sharp pain. Afterwards, expect swelling, tightness, some tenderness when opening the mouth wide, and occasionally puckering at the entry points that settles over days. Sleeping on the back and avoiding wide mouth movements and facial massage for a couple of weeks are usually advised.
HIFU is felt as brief, deep aches over bone, with numbing cream to take the edge off; tenderness may last a few days. Filler is given after numbing cream and often contains local anaesthetic; swelling and bruising can last up to a week. For all three, a review is planned, and any sudden pain, skin colour change or signs of infection should be reported the same day.
Most people return to work within a day or two of threads, the same day after HIFU, and the same or next day after filler, although visible swelling or bruising may influence timing before events. Planning treatment two to four weeks before an important occasion leaves room for swelling to settle and for any adjustment.
They do different things. Threads physically reposition descended tissue with an immediate change and a few days of recovery. HIFU tightens the SMAS and dermis gradually over months without needles. The choice depends on how much movement is needed, skin thickness and how much recovery you can accept, assessed at consultation.
Filler does not pull tissue upwards, but restoring volume at support points such as the cheekbone, chin or jaw angle can lift the tissue around them. Filling the folds directly tends to add weight instead. Dr Sin Yong assesses where support has been lost before placing any filler.
It varies with the type of thread, the area and the person. The threads dissolve over months, and the collagen formed around them continues to support the tissue for a time afterwards. Expected duration for your plan is discussed at consultation.
Yes, and combinations are common. Volume is often restored first, then lifting or tightening treatments follow, with spacing that allows each step to be assessed. Dr Sin Yong sequences them so that energy treatments do not affect newly placed threads or filler.
Cost depends on which treatments are used, how many threads, syringes or lines are needed, and whether a combination is planned over several visits. After assessment, Dr Sin Yong gives a written quote that sets out each component of the plan.
Swelling, bruising, tightness, puckering or dimpling at entry points, asymmetry, thread visibility or extrusion, and infection. Most are temporary and settle, but some need treatment or thread removal. Careful planning, sterile technique, the right thread for the area and review visits reduce these risks, and any concern after treatment should be reported early.
When there is marked skin excess, heavy jowls or significant neck laxity, non-surgical treatments are unlikely to give a satisfying change. In that situation Dr Sin Yong will tell you honestly that a surgical opinion is more appropriate, rather than offering treatments that cannot meet your goal.
IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, Singapore 228210. By appointment with Medical Director Dr Sin Yong. Monday to Saturday, 11am to 8pm. WhatsApp or call +65 8815 3008.
These sources describe mechanisms and general evidence. They are not a promise of any individual result; suitability is decided at an in-person assessment.