Many of you may have looked in the mirror recently and felt that your skin is not the same as before. This may feel even more true for those who are concerned about fine lines or decreased elasticity. At the same time, it is natural to hesitate when a method feels too burdensome or requires a long recovery period.
Today, we’ll take a closer look at a high-frequency care method that people with sensitive skin can receive relatively comfortably, while also allowing a quick return to daily life.
- Cheongnyangni CERF: How It Works by Combining Two Frequencies

The key point of this care method is that it simultaneously uses two different types of monopolar energy: 6.78MHz and 2MHz.
Unlike general high-frequency methods, combining these two frequencies allows thermal energy to be delivered evenly to multiple layers of the skin. It also has a three-step depth selection function, so the depth can be adjusted appropriately according to each person’s condition, and with 10 levels of fine energy adjustment, more precise care is possible.
In particular, it is equipped with a three-step cooling system, which is a major feature because it helps reduce epidermal damage while still delivering heat to deeper layers.
- Cheongnyangni CERF: A Solution Suited for These People

This method is especially suitable for people with thin and sensitive skin. Even those who found general high-frequency care burdensome may be able to receive it relatively comfortably.
It can also be a good option for office workers or students who have difficulty handling a long recovery period because of a busy daily routine. It may also be helpful for those who want quick improvement or those who want to care for fine lines and tightening at the same time.
Above all, if you are sensitive to pain, it may be worth considering this method with the cooling system applied. That is because it can deliver sufficient energy while preventing excessive temperature rise through its powerful cooling function.
- Cheongnyangni CERF: Duration and Care Interval

The results of this care method are generally known to last about 9 to 12 months. Of course, there may be individual differences, but its advantage is that an improved condition can usually be maintained for close to a year.
The care interval can be set at 6 to 12 months, and this may vary depending on the individual’s skin condition and desired results.
The time when changes can be felt after the first care is about 2 to 4 weeks, as improvements in elasticity and fine lines can be gradually noticed as collagen forms anew. Because it has a real-time surface temperature monitoring system that helps prevent excessive thermal stimulation, you can receive it with greater peace of mind.
- Things to Keep in Mind After Cheongnyangni CERF Care

After receiving care, it is best to follow a few precautions. First, avoid touching or rubbing the treated area. Unnecessary irritation does not help during the skin’s recovery process.
It is recommended to avoid alcohol and smoking for about a week, and please also avoid environments that involve high temperatures, such as saunas and public baths. Strenuous exercise should also be avoided during the same period. Above all, it is important to apply moisturizer and sunscreen carefully. Since the skin may be more sensitive than usual after care, thorough protective management is necessary.
Improving skin elasticity and fine lines does not happen overnight; consistent care and choosing the right treatment method are important.
Especially for those with sensitive skin or those who need to return to daily life quickly, this may be a worthwhile option to consider. Above all, it is important to find a method that fits your own condition and lifestyle.
