Sagging skin: tightening, repositioning, and telling them apart

Two problems that look like one

Almost every disappointment in this category comes from treating the wrong one.

Laxity is tissue that is still where it belongs but has lost firmness. Descent is tissue that has moved down — a jowl, a heavy fold, a lower face that has changed shape.

Most treatments marketed as "lifting" address the first. Very few address the second, and the ones that do are more invasive. Working out which you have, and being told honestly, is most of the decision.

What tightens

Focused ultrasound and radiofrequency heat tissue so collagen contracts and more is laid down over the following months. They differ in depth and delivery — ultrasound at fixed depths including the SMAS, radiofrequency diffusely through a volume — but neither moves anything.

The pooled evidence for focused ultrasound is the strongest in this category: a 2024 meta-analysis of 42 studies found 89% of patients rated improved by investigators (95% CI 81–94%) and 84% by themselves (95% CI 73–91%), with a generally favourable safety profile.

Read that as most people seeing some change, gradually. Not as a facelift.

One caution on the satisfaction numbers that applies across this whole category: the same analysis found pooled satisfaction of 84% falling to 62% in studies that let patients answer neutrally. Published satisfaction for monopolar radiofrequency ranges from 50% to 82%. Any single figure quoted at you is a selection from a wide field.

What repositions

A thread lift passes barbed absorbable sutures under the skin and draws tissue upward. It is mechanical, and you see it on the day.

The published follow-up is specific, and it is the number to hold a clinic to: one series maintained 70% of the initial correction at 12–24 months, another 60% at 36 months. So it fades, and a meaningful part of what was paid for is gone within a few years.

Complications are common though mostly minor — a 2026 meta-analysis of 26 studies and 2,827 patients found swelling in 34%, bruising 26%, and visible or palpable threads in 10%.

When surgery is the honest answer

The 2017 review of thread lifting reaches a conclusion that is unusually direct for this field and worth quoting rather than paraphrasing: thread lifting "should not yet be adopted as an alternative to rhytidectomy", with results described as subtle and of short duration compared with surgery.

That does not make thread lifting pointless. It means there is an amount of descent past which suspension on absorbable sutures will not hold, and past that point the non-surgical options are managing an expectation rather than the problem.

A clinic willing to tell you that is more valuable than one that will sell you three courses first.

What none of them do

• Restore volume. A hollow is a filler or collagen stimulator question.
• Improve skin quality. Texture and pigment belong to resurfacing and boosters.
• Work on the day, in the case of the energy devices. Change accrues over months, and judging at two weeks is judging too early.

What to ask at a consultation

• Is my problem laxity or descent? Make them answer this first.
• If an energy device is proposed for descended tissue, what is the reasoning?
• Which device or thread, and what is its Korean product name?
• What specifically do you expect to change, and when should I judge it?
• If both a device and threads are proposed, what is each one for?
• At what point would you tell me this is a surgical question?

The bottom line

Separate laxity from descent before anything else. Energy devices tighten tissue that is in place — focused ultrasound has 89% investigator-rated improvement across 42 studies — and reposition nothing. Threads reposition, immediately but modestly, keeping around 70% of the correction at one to two years and 60% at three. A review of the literature concluded thread lifting is not yet an alternative to surgery, and past a certain amount of descent, that is the honest answer.