During Thermage treatments, patients often ask if they can reach an 8.0 energy level or request higher energy settings. Reaching an 8.0 energy level has become a trend, with patients even competing on social media to see who received the highest energy settings.Ultimately, this stems from misleading marketing by certain institutions and influencers, fostering a widespread misconception in the aesthetic medicine market: higher energy equals greater satisfaction. They claim that with highly skilled practitioners, patients can achieve the 8.0 energy level!
This misdirection has elevated excessively high energy levels—or the 8.0 benchmark—into a standard for proving practitioner expertise. As a result, Thermage practitioners compete to challenge the 8.0 energy threshold, blindly pursuing high energy levels that don’t align with the patient’s individual suitability. Some even resort to sliding or micro-sliding techniques to force patients who cannot tolerate 8.0 to reach that level, completely disregarding the procedure’s efficacy and associated risks.It must be said that both patients and practitioners are victims of marketing tactics.
Using pain-heat feedback as the energy level selection criterion is an operational standard jointly developed by global experts and validated through two decades of clinical practice. It is also the standard universally recognized by experts nationwide. So, does relentlessly pursuing high energy levels and sliding techniques truly lead to higher patient satisfaction? Let's analyze this fundamentally.
PART 01
For different individuals, the appropriate energy level is primarily determined by their skin's electrical resistance and impedance, with technique being a secondary factor.
Under a given voltage, the magnitude of current flowing through the body depends on the resistance of the pathway. This resistance varies with each individual's tissue structure—influenced by dermal thickness, fat layer depth, the size and shape of fibrous septa, moisture levels, and other factors. Consequently, tolerance for energy levels differs among patients.
Schematic Diagram of Electrical Impedance
When radiofrequency energy is applied to the body, the current flows between the positive electrode (treatment head) and the negative electrode (circuit board). Upon contact with tissue, electrical energy is primarily converted into thermal energy through resistance.As shown in the diagram above, the skin tissue in the treatment area represents local impedance (R1), while the path between the body and the grounding plate constitutes body impedance (R2). The ratio of local impedance to total impedance (R3 = R1 + R2) determines how much energy is utilized in the treatment area versus how much is dissipated along the return path to the grounding plate.
For example, what happens when an 8.0 level (140J energy) is applied to two subjects with different impedances?
When the same energy is applied to different subjects, due to varying impedances, Subject 1 receives only 46J locally (1/3 of total energy), while Subject 2 receives 93J locally (2/3 of total energy).Thus, at the same energy level, Client 1 experiences "tolerable" heat sensation due to lower actual localized energy absorption and can withstand this high energy setting. Conversely, Client 2 experiences "intolerable" heat sensation due to higher actual localized energy absorption, cannot tolerate this high energy level, and is highly susceptible to burns.
Therefore, only individuals with an extremely low local/whole-body resistance ratio can tolerate an 8.0 energy level, and such cases are rare exceptions.Energy levels vary significantly between individuals and cannot be generalized. The energy settings chosen for one patient do not represent what is suitable for all. If high energy levels are mistakenly adopted as a universal standard, the vast majority of patients will experience severe pain, burns, fat atrophy, tissue scarring, and other adverse reactions.
Therefore, we must adhere to the Thermage standardized operating consensus, which prioritizes the patient's own pain and thermal feedback as the definitive standard for energy level selection.
PART 02
The global Thermage expert consensus explicitly emphasizes that employing energy levels beyond a patient's tolerance does not equate to higher satisfaction. Instead, it carries potential risks of severe pain and burns. Thermal feedback remains the sole criterion for energy selection.
Comparative studies of tissue ultrastructure under RF exposure reveal that both increased energy levels and multiple passes can enhance collagen denaturation. Consequently, many practitioners and patients mistakenly believe higher energy yields better results. However, human skin tissue exhibits distinct biological responses at different temperatures. Thermage's therapeutic range of 65°C–75°C, effectively induces both collagen contraction and a healing response. Excessively high temperatures, however, cause irreversible skin damage, potentially leading to scarring, permanent skin necrosis, and other complications.
PART 03
Pursuing high energy levels—even employing sliding techniques to enhance comfort—compromises both efficacy and safety.
As the gold standard in RF skin tightening, Thermage employs a precise spot-treatment approach. Its patented technology ensures "thermal equilibrium" during operation—effectively heating deep tissue while simultaneously cooling the epidermis. This achieves both efficacy and safety. In contrast, sliding techniques at the 8.0 energy level present numerous issues and risks.
First, during sliding operation, heat disperses without effective accumulation, reducing treatment depth. This is why patients report minimal discomfort during the procedure—a sign of insufficient subcutaneous tissue heating. While sliding may yield immediate results, it cannot guarantee long-term efficacy like the targeted approach.
Second, sliding operation exposes some heated areas to insufficient cooling pulses. Insufficient epidermal cooling can lead to blistering and epidermal burns. Thermage releases cooling agents before, during, and after each RF pulse to lower epidermal temperature and provide protection. Sliding operation leaves certain areas without cooling, increasing the risk of blistering and epidermal burns.
The above depicts Thermage energy detected by a thermal imaging camera. When the operator uses the standard medium-to-high energy spot technique, the heat source area appears yellow after RF emission, while the cooling zone is purple. If we move the cooling agent to the next grid just before the post-cooling pulse is emitted, we observe that the cooling shifts to another grid, leaving the hotspot area inadequately cooled.Simultaneously, we observed that the sliding technique disperses heat, resulting in lower average energy per skin area and even reduced total energy delivery. Therefore, fixed-point operation ensures effective energy accumulation while enabling synchronized cooling, achieving both safety and efficacy.
Finally, sliding operations increase the risk of electrode breakdown due to poor contact and friction stress, leading to membrane damage and burns—specifically more severe linear scarring burns!
Thus, pursuing excessively high energy levels and sliding techniques are both flawed approaches, yielding inferior efficacy and safety compared to precise, stationary energy application.It is crucial to understand that selecting the energy level for Thermage treatment should be based on the patient's thermal feedback. Avoid blindly pursuing high energy levels, as the 8.0 setting lacks universal applicability. While the sliding technique may feel more comfortable, it disperses energy and provides insufficient cooling, compromising efficacy and increasing the risk of burns.
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