How much can HIFU (UTIMS A3) lift sagging skin? What research reveals about effectiveness and limitations

HIFU is a non-incisional treatment that tightens skin using ultrasonic heat. Research shows modest changes, such as eyebrows lifting 0.47–1.7 mm[1]. Physician assessments found improvement in 92% of cases at 90 days, which persisted for up to one year[1]. However, the effect is considered less substantial than surgical or injection treatments[2]. Within the scope of this review, we found no studies comparing effectiveness narrowed to the UTIMS A3 device specifically.

What does HIFU do inside the skin?

HIFU focuses ultrasound waves to a single point deep in the skin and applies heat. This heat is thought to stimulate collagen production and tighten the skin[3].

Because it does not injure the skin surface, recovery is faster than with surgery[3]. According to a German dermatology report, the primary candidates are patients with sagging that does not warrant surgery, and most require only 1–2 treatments[4].

How much does sagging lift?

The amount of lift is a small change measured in millimeters. In a research summary, eyebrow position rose 0.47–1.7 mm, and the area under the chin viewed from the side decreased by 26–45 mm²[1].

Another study reported eyebrow lift of approximately 1 mm—a clear but modest change[5]. In lower-face sagging, skin laxity improved in 58.1% of cases[6].

How long does the effect last?

Research has confirmed results for roughly one year. Physician assessments showed improvement in 92% at 90 days, and this effect persisted for up to one year[1]. No data exist for longer periods[1].

In an Asian study, eyebrows had lifted 0.47 mm at 90 days but had returned to 0.12 mm lift by 180 days[6]. Textbooks also note that the amount of eyebrow elevation from ultrasound is minimal and does not last as long as surgical results[7].

How do I choose between HIFU, surgery, and injectables?

If you want substantial lifting, HIFU alone may not be sufficient. Japanese aesthetic medicine guidelines state that while HIFU is effective for wrinkles and sagging, it does not match the results of surgery or injectables, earning a "weakly recommended" rating[2].

On the other hand, scarring is rare and the risk of complications is low[2]. The right method depends on your goal: subtle tightening without incisions versus a noticeable change in shape.

How much pain and side effects are there?

Pain is an important point to know beforehand. In an Asian study, 54.4% of treatments were recorded as causing "severe" pain[8]. One report stated that considerable pain is the major drawback[4].

Post-treatment pain usually subsides within about 2 days[5]. Most side effects are temporary redness, swelling, and discomfort that resolve within hours to days[3].

Rarely, complications such as fat atrophy, nerve irritation, or pigmentation changes may occur[3]. These have been attributed to device settings, operator experience, and insufficient pre-treatment assessment[3].

What is unique about UTIMS A3?

The UTIMS device was used in a 58-patient study combined with Thread lift, where cosmetic ratings improved after 3 treatments[9]. However, because this study combined Thread lift with HIFU, the effect of HIFU alone cannot be isolated[9].

Within the scope of this review, no studies directly comparing UTIMS A3 to other HIFU devices were found. Comparing devices is less useful than confirming the depth and amount of energy delivered and how pain is managed.

What should I confirm before treatment?

During consultation, ask about these points:

Expected change: Is millimeter-level tightening sufficient for your degree of sagging?[1][2]

Number of sessions and intervals: How many treatments, and when will results be reassessed?[1][4]

Pain management: Is there pain control during treatment?[8][4]

Other options: Which works best—Thread lift, injectables, or surgery—for your situation?[2][9]

Whether HIFU suits your sagging and what degree of change to expect cannot be determined from this article alone. At your consultation, have your degree of sagging and skin thickness assessed, and confirm the treatment area, number of sessions, and pain management.