Between CoolFase and XERF, the main difference for the patient is usually... comfort during the sessionIn practice, CoolFase tends to be better tolerated, which weighs heavily in the treatment decision.
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CoolFase or XERF: which delivers better results in treating sagging skin?
Both can improve skin firmness and texture. The deciding factor is not "which one treats sagging," but which allows for the delivery of adequate energy without excessive suffering..
Both CoolFase and XERF use monopolar radiofrequency to heat the dermis. This heating stimulates collagen remodeling over the weeks. When the energy is applied correctly, the results tend to be similar in terms of gradual improvement.
The problem is that if the treatment is too painful, the session often needs to be interrupted or done with less energy than ideal.
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Which hurts less: CoolFase or XERF?
In general, CoolFase usually hurts less.This happens because it prioritizes continuous cooling through direct contact at the tip.
In practice, monopolar radiofrequency systems with more efficient cooling reduce the pain perceived by the patient without losing clinical effectiveness. This has already been observed in studies comparing different radiofrequency cooling methods.
The XERF also has a cooling system, but its core feature is multifrequency. For more sensitive patients, this combination may cause more discomfort, depending on the area treated and the parameters used.
Why does comfort change the final outcome so much?
Because Tolerable treatment is treatment done well.When the patient is able to complete the session calmly, the doctor can work more consistently.
In clinical practice, it is common to observe that very painful sessions lead to frequent pauses, reduced energy, or patient anxiety. All of this interferes with the thermal stimulation necessary for collagen response.
For this reason, when the goal is reliability with a good experience, CoolFase is usually the most predictable choice.
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Does XERF have any practical advantage?
Yes, in specific cases. XERF works with multiple frequencies, which allows it to reach different theoretical depths of the skin.
This can be advantageous when the treatment plan requires a highly targeted, in-depth strategy. However, this benefit only holds true if the patient tolerates the procedure well.
Multifrequency therapy does not compensate for excessive discomfort. Well-tolerated energy almost always wins over "ideal on paper" energy.
How many sessions are needed?
It depends on the skin type and the degree of sagging. There is no single safe number that works for all patients.
Monopolar radiofrequency promotes progressive collagen remodeling. Some people notice an initial improvement, but the most consistent effect appears over the weeks. Protocol, interval, and maintenance vary greatly depending on age, skin thickness, and habits.
Comparing the number of sessions between different clinics often leads to confusion.
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Is it repairable or is there a risk of staining?
There is usually no retraction. The most common symptoms are temporary redness and a feeling of residual warmth.
The risk of discoloration is low when the treatment is properly indicated and executed, but it increases if the skin is sensitive or if there is inadequate sun exposure afterward. Therefore, prior evaluation and correct guidance make all the difference.
Who is not the best candidate?
People expecting the effects of a surgical facelift are often disappointed. Radiofrequency improves skin quality, but does not reposition deep structures.
Caution is also needed on inflamed or highly sensitive skin, or in patients with a history of post-inflammatory hyperpigmentation. In these cases, the timing and choice of device are more important than the brand.
About Dr. Renata Ralha
It is common to observe in the doctor's office that the patient does not want "the most modern technology," but rather a treatment that works without unnecessary suffering.
In practice, when sagging is mild to moderate and the priority is comfort, predictability, and adherence to treatment, I usually prefer technologies with more efficient cooling, such as CoolFase. In very specific cases, I consider other platforms, always clearly explaining the limitations and what can realistically be expected.
Conclusion
CoolFase and XERF both treat sagging skin, but they don't deliver the same experience. For most patients, CoolFase tends to be better tolerated, which facilitates completed sessions and more consistent results.
The best decision always depends on your skin, your goals, and your tolerance to the procedure. Individual assessment remains essential.
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If both work, why choose CoolFase?
Because it tends to hurt less and allows for more comfortable sessions without sacrificing effectiveness.
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XERF is stronger
Not necessarily. It works with multiple frequencies, but force without tolerance doesn't produce better results.
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Does it hurt a lot?
Yes, it can hurt. The difference is that systems with better cooling tend to be more bearable.
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How long will it take to see results?
The improvement is progressive. Collagen responds over the weeks.
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Can I combine this with other treatments?
Most of the time, yes. The order and interval need to be individualized.
Dr. Renata Ralha, Clinical, Aesthetic and Hair Dermatologist, CRM: 52-84102-1 RJ, RQE No.: 28115
Dr. Renata Ralha, dermatologist, specializing in Clinical and Aesthetic Dermatology, full member of the Brazilian Society of Dermatology (SBD), postgraduate studies in Dermatology and Dermatological Surgery.
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