How Many Days Is the Downtime for XERF? What to Expect and How to Spend the First Week

XERF is a radiofrequency (RF) device for treating sagging, developed by the Korean company Lutronic. In Japan, it received certification from the Korean MFDS in 2024 and began being introduced domestically in 2025. By combining 6.78 MHz, which works on shallow layers, with 2 MHz, which reaches deeper layers, it can deliver heat to the fat layer without increasing the output.

The irradiation depth can also be adjusted in stages from the surface layer to the superficial subcutaneous layer, allowing adjustment according to the target layer. The mechanism and results are explained in more detail in the article below.

Please note that XERF is an unapproved medical device that has not received approval under Japan's Pharmaceuticals and Medical Devices Act. At LIVELY CLINIC, the device is obtained through personal importation and used following a medical consultation under the individual responsibility and supervision of a physician.

There are also no domestically approved devices with the same type and equivalent effects. XERF itself received certification from the Korean MFDS (formerly KFDA) in 2024. However, certification in other countries does not mean that its safety and efficacy have been confirmed in Japan. Please also be aware that treatment using personally imported devices may not be covered by Japan's relief system for sufferers from adverse drug reactions.

To give you the conclusion first, most people recover enough to appear in public on the same day as treatment. This is because the treatment does not create wounds on the skin's surface, so the type of recovery differs from treatments involving needles. Even so, saying there is “zero” downtime could cause concern for people who do experience redness. Let us look at the symptoms individually.

Immediately after irradiation, the cheeks and jawline may become slightly red, with a sensation of heat similar to that after sun exposure. This occurs because blood flow temporarily increases in skin exposed to heat, and in many cases it subsides within several hours to about a day.

Some people may also feel that their entire face is slightly swollen. Significant swelling or bruising is not common, and even if bruising occurs, it is generally said to disappear within several days to about a week. However, reactions may occur somewhat more easily around the eyes, where the skin is thin, and along the jawline close to the bone. On days when these areas receive more irradiation, allowing yourself a little extra time can provide peace of mind.

Although rare, burns, hyperpigmentation, temporary changes in skin sensation, and hollowing of the cheeks due to fat loss may occur. If you develop blisters, redness accompanied by severe pain, or symptoms that worsen after more than 48 hours, contact the clinic where you received treatment rather than monitoring them on your own.

The symptom most likely to persist until the following day is dryness rather than redness. Immediately after heat is applied, the skin loses moisture more easily, and some people may feel that their usual skincare is insufficient. A tight sensation may continue for several days, but it will normally return to its usual state naturally with more generous moisturization.

It is also important to remember that the skin may be sensitive during this period, even if you do not notice it. Because there are no surface wounds, you may treat the skin as usual and irritate it with your regular Peeling. This can extend redness that would normally resolve in one day to several days.

There are two reasons the treatment is considered to place less burden on the skin. The first is the use of different frequencies. The design helps avoid the conventional dilemma in which output must be increased to reach deeper layers, consequently increasing the burden on the epidermis.

The second is temperature management. Cooling of the treatment surface and adjustment of the pulses control the temperature so that the skin's surface does not become excessively hot. The important point is that downtime is not determined by the name of the device. The output, the depth, and the number of shots all affect how the skin reacts.

It can be difficult to plan your schedule based only on explanations of individual symptoms. From here, we will follow the timeline and look at what happens and when. Knowing the expected course in advance should make it easier to choose your treatment date.

Redness and heat sensations peak immediately after irradiation. When you look in the mirror, you may feel that you are “redder than expected,” but the redness at this stage will gradually fade over time. After returning home, simply be mindful not to rub your skin strongly.

Some people may feel that their face looks tighter. This is an immediate change caused by the contraction of collagen fibers due to heat, and the appearance on this day will not necessarily remain unchanged. At night, switch from bathing to a short shower, moisturize more generously than usual, and rest.

In most cases, the redness has almost subsided by the following morning. Many people recover to the point that others cannot tell they have had treatment when they apply makeup, and quite a few return to work as usual at this stage.

On the other hand, this is also when dryness and tightness are most likely to be felt. If your makeup does not apply smoothly, try adding an extra layer of moisturizer before your primer. If you want to conceal redness, using a thin layer of color-correcting primer will look more natural than applying heavy makeup. Applying thick layers increases friction.

From day three onward, the reactions specific to treatment have mostly settled. What occurs from this point is less about recovery and more about gradual changes, as the tissue stimulated by heat quietly proceeds through the process of rebuilding collagen.

This internal reconstruction is not visible. Some people notice changes in skin texture and tone after about one to two weeks, but this is a period when it may be difficult to feel major changes. At this stage, continuing to moisturize and protect your skin from UV rays will ultimately lead to greater satisfaction than rushing to undergo another treatment. Allowing yourself time to do nothing intentionally can also be a valid choice.

Many people are less concerned about the treatment itself than about what to do afterward. The actions people most often ask about include the following.

Since the timing for resuming each activity differs, let us go through them one by one.

Because XERF does not create wounds on the skin's surface, you can generally apply makeup and wash your face from the day of treatment. However, since you will want to reduce friction from cleansing on the day itself, keeping point makeup light can reduce the burden on your skin.

When washing your face, gently move the foam over your skin and rinse with lukewarm water. Hot water will dry skin that may still feel warm. Avoid wipe-off cleansers and scrubs at least on the day of treatment.

Activities that strongly increase blood circulation can prolong redness and flushing. It is safer to avoid long baths, saunas, hot-stone baths, and strenuous exercise on the day of treatment and resume them from the following day onward.

Showers are generally fine from the day of treatment, and many clinics allow short baths as well. Going to the gym the next day is also generally possible, but reduce the intensity and monitor yourself while heat sensations remain. It is safer to continue avoiding exercise in hot, humid environments, such as hot yoga, the following day as well.

Since alcohol also promotes blood flow, it is best to limit it on the day of treatment. If the redness has subsided from the following day onward, you may generally drink as usual.

Be careful with treatments that apply strong pressure to the face, such as facial esthetics and facial contouring massage. Physically stimulating tissue immediately after it has been heated may trigger bruising or inflammation. We understand the desire to reduce swelling, but swelling on the day of treatment will subside over time. Confirm when to resume such treatments with the clinic where you received treatment before making an appointment.

Just as there are activities you can do, there are also clear activities to avoid. Specifically:

All of these can easily lead to changes such as redness and hyperpigmentation that may cause problems later. None are difficult to avoid, so take care during the few days after treatment.

Rubbing your face vigorously with a towel, using a facial cleansing brush, and sleeping face down for long periods are typical factors that prolong redness. Especially on the day of treatment, it helps to consciously reduce the number of times you touch your skin.

Mask friction is an often-overlooked issue. Repeatedly having fabric touch your cheeks and jawline is continuous stimulation for your skin. If you must wear a mask for work, choose one with a little extra room.

Skin immediately after exposure to heat is more susceptible to UV rays. To reduce the risk of hyperpigmentation, use sunscreen as usual from the day after treatment. If you plan to spend time outdoors, consider also wearing a hat or using a parasol.

UV exposure while driving or sitting near an indoor window is also easily overlooked. The amount that accumulates in daily life is not insignificant. During the week after treatment, taking extra care can provide peace of mind.

Combining XERF with HIFU or Laser is possible, and synergistic effects may be expected when the purposes differ. The issue arises when treatments are performed too close together, causing the burden on the skin to accumulate. The order and interval between treatments should be determined in consultation with a physician.

If you undergo a treatment at another clinic based on your own judgment, it may also become impossible to determine which treatment caused a particular reaction. Being unable to identify the cause when a problem occurs is disadvantageous for the patient as well. Consult the clinic in advance if you are considering combining treatments.

Even when people receive treatment with the same device, redness may soon subside for some while remaining faintly visible until the following morning for others. The main factors are skin thickness and the amount of fat, the irradiation design and number of shots, and lifestyle habits before and after treatment. Knowing which pattern is closer to your own can also affect how you choose your treatment date. Let us take a closer look.

Because XERF uses radiofrequency, people with a cardiac pacemaker or an implantable cardioverter-defibrillator cannot receive treatment. If a metal plate, silicone, gold threads, or another implant is present in the treatment area, treatment is also contraindicated to avoid the effects of heat or electrical current. Pregnant and breastfeeding people are also not eligible for treatment because sufficient safety data is not available.

A physician will also determine suitability individually for people prone to keloids, people whose wounds may heal poorly due to diabetes or other conditions, and people with skin conditions such as infection, significant inflammation, or herpes in the treatment area.

People requiring caution include those who have received Botox or Hyaluronic Acid injections in the treatment area within the past four weeks, and those who have undergone Fat Transfer within the past six months. The decision may be made to postpone treatment in these cases, so be sure to disclose any medical conditions, implants, and previous treatments during your consultation.

People with thin skin and little subcutaneous fat tend to feel heat more easily, even at the same energy level. People with hollow cheeks or naturally visible blood vessels may be considered to have conditions in which redness is more likely to occur.

In contrast, people with a thicker fat layer often experience milder surface reactions. However, the irradiation conditions need to be adjusted to deliver heat to deeper layers, which may make the treatment feel hotter.

Even on the same area, increasing the number of shots naturally increases the accumulated amount of heat. The post-treatment reaction may differ between a day when a broad area is treated thoroughly and a day when only areas of concern are addressed.

This is something you can discuss in advance. If you tell the clinic that you have plans the following day, the treatment can be designed after adjusting the output and number of shots. When booking or completing the medical questionnaire, explain your schedule for the following days in specific terms.

Sleep deprivation, alcohol, and salty meals can all affect blood vessel dilation and swelling, and when they occur around the time of treatment, reactions may be more pronounced. If your skin is experiencing significant irritation, postponing treatment until it settles may also be an option.

These are conditions you can control to some extent. If you plan to undergo treatment before an important event, simply paying attention from the day before treatment can make a difference.

Downtime is not simply something to endure after treatment; much of it can be controlled through preparation beforehand. The three points to prepare are the condition of your skin before treatment, how you arrange your schedule on the day, and moisturization after treatment. Let us look at the details.

The reaction can differ between dry skin and sufficiently moisturized skin even with the same irradiation. When the stratum corneum lacks moisture, heat is more likely to be transmitted unevenly, making stinging and redness more likely. As a general precaution for RF treatments, increasing moisturization for about a week before treatment can reduce the burden on the day.

Conversely, it is considered preferable to avoid Peeling and the use of highly irritating cosmetic ingredients immediately before treatment. Applying heat when the stratum corneum is thin can make irritation more likely. Skin immediately after sun exposure is similar, as it creates conditions in which redness is more likely to be pronounced.

When you hear that there is almost no downtime, you may be tempted to schedule a dinner immediately after treatment. Many people can actually spend the day without problems, but allowing yourself extra time is still preferable.

A manageable plan is to schedule treatment in the afternoon and spend the evening at home. Since the way redness subsides varies from person to person, especially for your first treatment, it is reassuring to plan on resuming your schedule from the following day onward. If you make a note of your first recovery period, you should be able to plan subsequent appointments much more accurately.

Moisturization is likely to be the most beneficial part of post-treatment care. Particularly during the first three days, replenishing moisture lost due to heat can help redness and dryness recover sooner. In both the morning and evening, apply multiple layers of lotion followed by an emulsion or cream to seal in the moisture.

On days when the heat sensation is strong, placing a cold pack wrapped in a clean towel on the skin for a few minutes may also help. However, excessive cooling can interfere with blood circulation and actually delay recovery. Use it only for short periods with breaks in between, and avoid placing ice directly on the skin.

Many people considering XERF are also unsure whether to choose HIFU or another device. Treatments for sagging can produce different post-treatment reactions depending on how they work. From the perspective of downtime, let us organize the differences between XERF and three representative treatments.

HIFU concentrates ultrasound at a single point to deliver heat to the deeper SMAS layer. Because it generates high heat at points, treatment may feel more painful, and some people may experience mild swelling or a strange sensation afterward.

Because XERF is designed to warm the skin over an area, both pain and post-treatment reactions are relatively mild. However, HIFU may be more suitable when the goal is lifting deeper layers. As a general guide, HIFU may be appropriate when sagging in the deeper layers is the main cause, while XERF may be appropriate when skin laxity or a decline in skin quality is the main concern. Do not choose based on downtime alone; consider the layer related to your concern when attending your consultation.

In the field of monopolar RF, single-frequency devices have long been used. Although a single frequency can deliver energy to deep layers, it requires a higher output, making it more likely to cause heat during treatment and redness afterward.

XERF can be positioned as a device that has moved toward reducing this burden through a combination of dual frequencies and cooling. Current Thermage devices also have cooling mechanisms, so it is not accurate to simply say that single-frequency devices are painful. As mentioned above, the strength of the reaction varies according to the irradiation design.

Thread lift is a treatment that physically lifts tissue, and swelling or a sensation of tightness may commonly continue for one to two weeks. While the extent of immediate lifting is appealing, its impact on daily life differs considerably from that of XERF.

For people who find it difficult to take extended time off, starting with RF treatment can be a reasonable choice. On the other hand, if sagging has progressed, there may be scope to consider combining treatments, so it is advisable to have your current condition assessed during a consultation.

Considering downtime together with when results appear can make decisions easier. You may feel mild tightening immediately after irradiation as collagen fibers contract, but this immediate change gradually settles over several days. The underlying remodeling that is the true purpose of treatment then progresses over the following months. Visible changes generally appear after one to three months.

Results are said to last for about six months to one year, and a common approach is to receive treatment once or twice every six months to one year. In other words, the timing when you feel the results and the timing when downtime ends are separate. For a wedding or photo shoot, you can either avoid treatment immediately beforehand and prioritize your appearance on the day, or receive treatment one to two months in advance to aim for the desired result. For first-time patients, the latter is generally preferable. Receiving treatment immediately beforehand without knowing how much redness you tend to develop makes the risk difficult to predict.

Consider your schedule carefully and determine the right timing for treatment.

In many cases, XERF downtime settles to the point that you can return to daily life on the day of treatment or the following day. Redness subsides within several hours, while dryness is more likely to persist from the following day onward. Avoid long baths and strenuous exercise on the day, and continue UV protection and moisturization from the following day. Keeping these two points in mind will prevent problems during recovery in many cases.

However, the speed of recovery is influenced by both your skin type and the irradiation design. LIVELY CLINIC offers XERF at its Osaka branch. After assessing the condition of your sagging and your schedule, we will propose a practical irradiation plan. If you would like to time treatment around your plans, please consult us first.