Every year when the seasons change, the topic of anti-aging quickly becomes a hot search in various social media platforms. In 2026, “ultrasonic therapy” and “thermage” remain the two most frequently discussed anti-aging treatments. Whether on platforms like REDnote, PTT, or South Korea’s Naver search rankings, these two terms consistently top the list throughout the year. However, there are very few articles that truly explain the differences between these two methods and can help you make the most appropriate choice. In today’s article, we will conduct the most comprehensive comparison of the two.
I. First, let’s understand how ultrasonic guns and Thermage work to tighten the skin.
Let’s start with the principles – these are the most fundamental aspects when choosing the right project.
Thermage, originating from the United States, uses monopolar radiofrequency technology. Its principle of action is as follows: electromagnetic waves are used to transfer thermal energy to the SMAS fascia layer deep within the skin (located approximately 3 to 4 mm beneath the surface). This causes the Collagen in this layer to contract instantly upon heating, while simultaneously stimulating the dermis to continuously produce new Collagen. In simpler terms, it works by “first causing the existing Collagen to tighten immediately, and then allowing the body to gradually produce new Collagen over time.”
Thermage has now evolved to its fifth generation, Thermage FLX. Compared to previous models, it incorporates the “AccuREP™ intelligent sensing technology,” which automatically detects the skin’s impedance and dynamically adjusts the energy output. This significantly reduces the risk of burns and enhances the comfort of the treatment. In 2026, in South Korea, genuine fifth-generation Thermage devices will be identifiable through a scanning verification system, providing an additional guarantee for those undergoing Thermage treatments in that country.
HIFU/Ultherapy is based on the technology of High-Intensity Focused Ultrasound. Its principle is more similar to “optical focusing” – it concentrates the energy of ultrasonic waves at a specific depth beneath the skin (usually at three levels: 1.5mm, 3mm, or 4.5mm), generating instantaneous high temperatures at the focal point. This creates tiny areas of coagulation, which in turn stimulate the regeneration of fascia and collagen.
The greatest advantage of the Ulthrea is its ability to provide real-time visualization of the treatment depth – during the procedure, immediate images can be observed to ensure that the energy is precisely delivered to the target layer without damaging the epidermis. In 2026, the most popular models in South Korea included the “Ulthrea” and the “Super Ulthrea” (the latest model from Peninsula Medical Group); the latter features a more refined design for energy distribution, resulting in reduced discomfort during treatment.
II. A side-by-side comparison of the six key aspects: Which one is more suitable for you?
① Levels of action
| Project | Main levels | depth |
|---|---|---|
| Thermage | Dermis layer + superficial SMAS layer | Approximately 3 to 4 mm |
| Ultrasonic cannon | SMAS deep fascia layer | Options available: 1.5 mm, 3 mm, 4.5 mm |
Simply put: Thermage provides a more even tightening effect across the entire facial skin; while the ultrasonic gun exerts a stronger pulling force on the SMAS deep fascia, making it more suitable for those with significant sagging.
② Pain sensation
This is a question that many people are most concerned about. To be honest, both methods are uncomfortable, but their nature is different.
The pain experienced with Thermage is similar to the stinging sensation felt when the skin is “scalded”; this effect is usually most pronounced in areas with higher energy levels, such as the cheekbones and jawline. The fifth-generation FLX model comes equipped with a vibration-based pain relief feature, which significantly improves the user experience compared to previous versions. However, those who choose the higher-energy models (with 600 treatments or more) should still be mentally prepared for the associated discomfort.
The pain associated with the ultrasonic cannon is a deep-seated “numbing sensation,” which is particularly noticeable when the treatment is performed at a depth of 4.5 mm. Some people describe it as a dull, throbbing pain similar to that caused by being pierced by fine needles. The good news is that most of the new models of ultrasonic cannons released in 2026 come equipped with pre-treatment anesthesia, which effectively reduces this discomfort.
③ Time required for the effects to become visible
Thermage: There is a slight sense of tightening immediately after the procedure (due to the immediate contraction of collagen), but the ultimate effect is achieved 3 to 6 months after the treatment (when the newly formed collagen has matured), and this effect lasts for 1 to 2 years.
Ultrasonic cannon: Significant lifting effects begin to appear 4 to 6 weeks after the procedure, and the peak effect is achieved after 3 months. The lifting effect is more immediate than that of Thermage, and the results last for 12 to 18 months.
④ Suitable target population
| Situation | Recommendation |
|---|---|
| The skin is loose, full of wrinkles, and lacks elasticity. | ✅ Reima Ji |
| Visible sagging (Apple Zone, eye corners, neck) | ✅ Ultrasound cannon |
| Preventive anti-aging for those aged 25 to 35 | ✅ Thermage (overall maintenance) |
| Aged 35 to 50, with noticeable sagging | ✅ Ultrasound cannon or a combination of both |
| Less subcutaneous fat, resulting in a gaunt face | ⚠️ Ultrasonic devices should be used with caution, as their energy can easily penetrate fat layers. |
⑤ Market prices in South Korea in 2026
Based on the average prices of Dermatology clinics in Gangnam, South Korea (10,000 South Korean won ≈ 53 RMB):
| Project | Price range | Remarks |
|---|---|---|
| 300 hairs for the entire face using Thermage | 1.2 million to 1.8 million Ko rean won (approximately 6,400 to 9,500 yuan) |
You can scan the code to verify the authenticity of genuine products. |
| 600 hairs for the entire face using Thermage | 2.8 million to 4 million Ko rean won (approximately 14,800 to 21,200 yuan) |
Gold standard treatment regimen |
| Ultherapy for the entire face in the American version | 1.5 to 2.5 million Korean won (approximately 7,950 to 13,250 yuan) |
100 to 200 treatments |
| Combined treatment using ultrasonic cannon and Thermage | 3.5 to 6 million Korean won (approximately 18,550 to 31,800 yuan) |
Some clinics offer package discounts. |
The above prices do not include a 10% surcharge; the actual fees shall be subject to the rates quoted by each clinic.
⑥ Can they be done simultaneously?
The answer is: Yes, but there are requirements regarding the time interval.
Ultrasonic therapy and Thermage work at different levels and are theoretically complementary to each other. However, to prevent the skin from being exposed to excessive thermal stress, the industry recommends leaving at least a 4-to-6-week interval between using these two treatments on the same area. Some South Korean clinics offer combined packages that involve using ultrasonic therapy to treat the fascia first and then Thermage for overall skin tightening; this combination results in better outcomes than using either treatment alone, and is particularly suitable for people over 35 years old who experience significant skin sagging.
III. What are the differences between having cosmetic procedures in South Korea and in China?
This is also a question that many people are most concerned about. Taking Thermage as an example, many domestic institutions quote prices ranging from 1,000 to 3,000 yuan per treatment, while in South Korea, a full-face treatment at a legitimate clinic costs between 15,000 and 21,000 yuan. Is it really worth the extra cost?
The differences are mainly reflected in three aspects:
1. Guarantee of genuine equipment: In South Korea, every Thermage device must be registered with the KFDA (South Korea Food and Drug Administration), and each treatment head comes with a unique serial number that can be scanned on-site for verification before treatment. The problems of counterfeit devices and refurbished treatment heads in the domestic market have yet to be completely resolved.
2. Physician-led treatment system: South Korean regulations explicitly stipulate that energy-based devices such as Thermage and ultrasonic guns can only be operated by licensed Dermatology physicians; nurses or beauticians are not authorized to use them.
3. Transparency in energy settings: Clinics in South Korea typically inform patients about the amount of energy used and specific parameters before the procedure, and patients are allowed to request access to their treatment records. Such transparency is not yet widely practiced in China.
IV. The most recommended types of clinics for ultrasonic therapy + Thermage in South Korea in 2026
I do not recommend specific rankings of clinics (as clinic information can change rapidly), but I suggest using the following criteria for selection:
- It has received a Naver rating of over 4.5 and contains nearly six genuine reviews from users over the past six months.
- Promising “personal consultations by the director,” it offers before-and-after comparison images of treatments (non-advanced version)
- Chinese translators or receptionists are available to ensure that any communication barriers do not lead to deviations in the implementation of the plan.
- The quotation clearly specifies the process for verifying the authenticity of the products and scanning the codes for verification.
- You can compare the quotes of multiple clinics in advance through platforms such as BeautsGO, to avoid being charged extra at the spot.
V. Selection Recommendations: A single sentence to help you make your decision
If what you want is to “look younger overall and have skin that is more elastic and tender” → Thermage is your top choice.
If your goal is to “lift the facial contours, reduce sagging, and achieve a V-shaped face” → Ultrasound therapy is your top choice.
If both requirements are met and the budget is sufficient, the combined approach will achieve the best results.
Regardless of which option you choose, it is highly recommended that you compare the quotes and patient reviews of multiple South Korean clinics on the BeautsGO platform in advance. Make your appointment through official channels and with the assistance of Chinese translation services, so that your money is spent where it is truly needed.
VI. Frequently Asked Questions Q&A
Q: How soon after the procedure can I wear makeu
p? A: After Thermage or Ulthera treatments, it is generally recommended to avoid using irritating cosmetics within 24 to 48 hours. You can resume wearing regular makeup 48 hours after the procedure. Some clinics provide post-treatment recovery serums; it is suggested to use them for 1 to 2 weeks.
Q: Can I take a flight back to my home country on the same day after the procedure?
A: Yes, you can. Neither of these two procedures requires any special recovery period; you can resume your normal activities immediately after the surgery. However, it is advisable to avoid strenuous exercise and drinking alcohol on the same day.
Q: How often is it appropriate to undergo these t
reatments? A: For Thermage, it is recommended to have the treatment every 12 to 18 months; for Ulthera, once every 12 months. Excessive frequency of treatments may actually lead to increased fat atrophy or skin sagging.
Q: Can it be done if there are implants (fillers, prostheses) in place? A: It is necessa
ry to inform the doctor about the location and type of the implants. Thermage and ultrasonic treatments can generally be performed on areas without implants, but the specific suitability must be assessed by a doctor.