The short answer
A jowl can come from several things: loose tissue, fat, or a deflated midface above it. HIFU addresses only some of these. So the consultation decides whether HIFU is advised at all, and no treatment is a real option.
HIFU places points of heat at set depths, and the aim is to target the tissue that has slid. It is one possible step, and the order of any steps is decided at assessment.
At examination, the doctor looks at whether the cheeks are hollow, whether the jowl swings when your head turns, and how much of the fullness is fat. Those answers shape the plan. A thread lift works mechanically, while HIFU relies on heat, so the two are not interchangeable.
Depths along the jawline
| Cartridge | Where it is used |
|---|---|
| 4.5 mm | At the SMAS along the jawline and lower cheek, where there is enough tissue depth. |
| 3.0 mm | In the dermis over the same zone. |
| 1.5 mm | Over thinner skin toward the front of the jaw and the neck. |
How the lines are placed
Lines run along the jawline and up the lower cheek. Energy is kept away from the course of the marginal mandibular nerve. The 4.5 mm cartridge is spared over thin tissue on the mandible, because heating bone adds nothing. Each zone is checked by palpation, and energy is adjusted as treatment proceeds. These settings are set individually.
Who HIFU for jowls may suit
A face with good volume and reasonable skin quality.
Cheeks that are not hollow, and a jowl that does not swing when the head turns.
Who should look elsewhere
| Finding | What may be considered |
|---|---|
| Heavy, mobile jowls with redundant skin | Plastic surgery referral |
| Mobile tissue that needs repositioning | Thread lift |
| A deflated midface | A biostimulator or filler to the midface, not into the jowl itself |
| Jowl fullness that is mainly compact fat | Time Freeze Laser LCLR® |
| Laxity mainly in the dermis and subcutaneous layer | VF Lift |
| A lean face | Looks elsewhere, given the risk of hollowing |
If the jowl is heavy
A jowl that is heavy with compact fat or settled filler is a different problem from laxity, and focused ultrasound is not aimed at it. Dr Sin Yong uses Time Freeze Laser LCLR® and its Sculpting mode for those jowls, after ultrasound mapping where filler is involved. See jowls treatment.
What it cannot do
HIFU cannot move descended tissue back into place. It cannot remove jowl fat or skin, and it cannot restore volume in the midface. It does not lift platysmal bands, which are assessed for botulinum toxin rather than heat. HIFU is not a surgical lift and should not be treated as one.
Risks and side effects
Jawbone tenderness, small bruising and slight swelling along the jaw.
Marginal mandibular nerve irritation can cause temporary weakness at the corner of the mouth, an asymmetric smile, or a lower lip that does not move fully. This needs prompt review.
This can occur over thin cheek tissue in lean faces.
A welt that does not flatten, marked or one-sided swelling, persistent numbness, or any change in mouth movement.
Sessions, recovery and fees
Zone-by-zone palpation and energy adjustment reduce these risks but do not remove them. The number of sessions is not fixed in advance. See how many HIFU sessions and HIFU downtime for detail. The fee depends on the zones and depths the examination calls for, whether HIFU stands alone or is combined with another step, and how the plan is staged. Singapore's rules prevent prices from being advertised, and a written quote follows consultation.