"HIFU," the royal road of no-scalpel sagging treatment. Did you know that there are actually "people for whom it doesn't work"?
- The True Effects and Limits of HIFU
- The medical evidence and duration as a sagging treatment
- The decisive difference between people for whom HIFU "works" and those for whom it "doesn't"
"It's trending on social media so I want to try it, but what if it just hurts and has no effect...", "Is it really worth paying a high price?"—there are very many women in their 20s–40s who worry about this.
The facial line and nasolabial folds you notice every time you look in the mirror. Being able toliftlift without a scalpel would be ideal, but there's too much information and you don't know what's true.
That concern—Zetith Beauty Clinic, a cosmetic-medicine specialist, will thoroughly verify and clearly resolve it based on evidence (scientific basis).
HIFU's Effect Is Not Permanent—The Medical Reason
To state the conclusion, HIFU's sagging-treatment effect is not "permanent." "Wait, it's so expensive but doesn't last a lifetime?" you might be surprised. There is a clear medical reason for this.
HIFU (high-intensity focused ultrasound) is a treatment that pinpoint-irradiates the thermal energy of ultrasound to the "SMAS fascia," a superficial fascia in the deep layer of the skin. The heat-damaged fascia contracts tightly, thereby lifting the whole face.
In contrast to traditional surgery, which "cuts with a scalpel and lifts the skin," HIFU is a groundbreaking treatment with the contrast of "contracting from the foundation with the power of heat."
However, a question arises here. Why is it not permanent?
That is because the human face continues to "age" every day. Even if HIFU temporarily turns back the clock, it cannot completely stop the natural phenomenon of aging itself.
This is the "limit of no-scalpel sagging treatment." That's precisely why caring continuously with the right knowledge is the only path to maintaining beauty.
HIFU Is Not a Placebo—Verifying the Sagging-Treatment Evidence
HIFU's satisfaction has been shown in multiple reports to be a very high "80–90% or more." For the question "does it only have a placebo-level effect?", solid medical evidence does exist.
For example, in a clinical study by Alam M et al. on a single irradiation of the face and neck, 90 days after treatment, an objective lifting effect was confirmed by photo evaluation inabout 86%of patients[1].
Furthermore, in multiple study data investigating patients' own subjective satisfaction, at 6 months post-treatmentabout 82–90%of people answered that "the sagging improved and the facial line became sharper"[2].
HIFU shows a tightening effect from heat contraction right after irradiation, but the true effect begins from there. Over about 2–3 months, a large amount of collagen is induced through wound healing (the action of trying to repair the wound).
We'll explain in detail later, but to maximize HIFU's effect and keep it for a long time, the timing of continued treatment becomes very important.
The Mechanism by Which Ultrasound Increases Collagen
Through HIFU irradiation, the tissue in the deep skin layer reaches a heat of 60–70 degrees. This thermal energy first immediately contracts the existing collagen fibers, bringing tissue tightening. After that, the heat-stimulated tissue enters a wound-healing response, fibroblasts are activated, and over weeks to months new collagen is produced (the immediate heat contraction and the subsequent collagen neogenesis differ in the timing of their action)[3].
This double action of "heat contraction" and "collagen neogenesis from wound healing" is precisely HIFU's unique strength of not only tightening the surface but also improving the skin's firmness and elasticity.
Was "HIFU Doesn't Work" True? The Surprising Characteristics of People for Whom It Has No Effect
People who change dramatically after HIFU, and people who don't change at all. The difference lay in the surprising point of "the amount of facial fat and the bone structure." It doesn't work magically for just anyone.
As an indication for HIFU (a state suited to treatment), the easiest to show an effect is"a person with moderate subcutaneous fat who sags due to laxity of the SMAS fascia". People in their 20s–40s who have begun to notice bagginess in the facial line tend to readily obtain an improvement effect.
On the other hand, for the following kinds of people, there are limits where the effect is weak or even counterproductive.
- People with extremely little subcutaneous fat: When a person without facial fat receives HIFU, the fat atrophies further, carrying the risk of failures such as "sunken cheeks" or "looking older."
- People with severe skin sagging: When not only the fascia is lax but the skin itself is greatly excess and hanging down, HIFU's tightening alone physically cannot handle it.
That's precisely why an accurate prior assessment (examination) by a physician is essential. Gauging each person's fat amount and bone structure is the absolute condition for successful sagging treatment.
The Output Difference Between Medical HIFU and Salon HIFU—Why the Same Name Yields Different Results
Sometimes you hear voices like "My friend got sharper, but I felt no effect at all when I had it done at a salon..." Wait, really? Why does a difference appear despite it being the same HIFU?
In fact, the "medical HIFU" you receive at a clinic and the "salon HIFU" you receive at a beauty salon are completely different in output and effect—only the name is similar.
To reliably deliver heat to the deep SMAS fascia and coagulate and contract the protein, a strong output (joules) that only medical institutions can handle is needed. Salon devices do not fall under controlled medical devices in the Pharmaceuticals and Medical Devices Act, and their output is greatly restricted from a safety standpoint. Direct comparison data on the output difference between medical and non-medical devices is limited, but at present there is no evidence that non-medical devices meet the output needed to reach the fascial layer.
If you expect a higher effect, receiving medical HIFU at a clinic with a physician well-versed in anatomy more readily leads to appropriate treatment.
The Evidence-Based Duration of HIFU and the Optimal Treatment Frequency
So, exactly how long does HIFU's effect last? Since it's an expensive treatment, how long you can stay beautiful is a very pressing concern.
Based on evidence, the peak of collagen generation from HIFUcomes at 2–3 months after treatmentAfter that, the effect gradually declines, but generally the lifting effect is said to last abouthalf a year to one year. Re-irradiating at the timing of about every half year to one year, before the effect completely disappears, is important.
Performing a second irradiation before the collagen savings run out adds a further tightening effect on top of the previous base. As the number of sessions accumulates, a sag-resistant contour firmly sets in.
The concept of "HIFU savings"—continuing HIFU at a pace of once every six months as "sag prevention" from one's 20s and 30s—is also one reasonable continuous approach.
Treatment-Specific Points to Watch After HIFU Irradiation
To keep HIFU's effect even one day longer, post-treatment care is also important. For 72 hours after irradiation, it is recommended to avoid heat stimulation to the treated area such as bathing, sauna, and vigorous exercise, and also to refrain from strong compression (massage, etc.) of the irradiated site.
Tissue just after heat damage is undergoing a wound-healing response, so adding unnecessary stimulation during this period may impede the collagen-neogenesis process. Following your attending physician's instructions and performing appropriate care is tied to maximizing the treatment effect.
The Part HIFU Alone Cannot Cover—Combination With Other Treatments Is Key
We're sorry to those who expected "just having HIFU will give me a perfect small face!", but the truth of sagging treatment is a bit deeper.
Facial aging occurs through a complex interplay of skin laxity, bone atrophy, ligament stretching, and fat descent. Therefore, in the latest cosmetic medicine,"combination treatment"is a global trend and has solid evidence.
What HIFU handles is, after all, "tightening of the facial foundation (SMAS fascia)" and "tightening of the fat." Comparing it to pitching a tent, it corresponds to the work of pulling slack cloth taut.
What if the tent's poles (the bones or deep fat) themselves have shortened with aging? Or what if the cloth itself is greatly in excess?
- For insufficient volume,hyaluronic acid： inject into the hollowed part and re-erect the pole that serves as the foundation.
- For physical descent,thread lifts： physically lift the excess fat or skin and return it to the ideal placement.
Combining these with HIFU lets them complement each other's limits, making the recovery of natural dimensionality easier to expect.
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Summary of This Article
- HIFU's satisfaction is 80–90%—high, and it is an effective treatment backed by medical evidence
- The effect peaks at 2–3 months later,the duration is half a year to one year. Regular continued irradiation is key
- There is a "limit": it's not suited to people with little facial fat or severe sagging
- To produce a reliable effect, receiving medical HIFU at a medical institution rather than a salon more readily leads to appropriate treatment
- Hyaluronic acid, thread lifts, etc.—combination with other treatmentsbrings a higher effect
Whether HIFU truly suits your face, or whether another treatment is better—it's hard to find the answer with internet information or self-judgment alone.
At Zetith Beauty Clinic, experienced physicians carefully examine each person's bone structure, fat amount, and skin type, and propose only the treatment truly necessary for you. Please feel free to consult us first.
References
- Alam M, White LE, Martin N, et al. Ultrasound tightening of facial and neck skin: a rater-blinded prospective cohort study. J Am Acad Dermatol. 2010;62(2):262-269. doi:10.1016/j.jaad.2009.07.049
- Suh DH, Shin MK, Lee SJ, et al. Intense focused ultrasound tightening in Asian skin: clinical and pathologic results. Dermatol Surg. 2011;37(11):1595-1602. doi:10.1111/j.1524-4725.2011.02094.x
- Laubach HJ, Makin IR, Barthe PG, et al. Intense focused ultrasound: evaluation of a new treatment modality for precise microcoagulation within the skin. Dermatol Surg. 2008;34(5):727-734. doi:10.1111/j.1524-4725.2008.34196.x