Key takeaway: In side cheek hollowing treatment, Oligio XM and Juvelook Volume can be a good combination, but synergy does not appear just by adding the two. Side cheek hollowing is closer to an empty space than to tissue that has dropped, so the result becomes natural only when you divide the roles, tightening the sagging line with Oligio XM and filling with Juvelook Volume or McCoom, and then decide where, how much and in what order to use each.
Side cheek hollowing is a matter of empty space rather than sagging
If you often hear that you look tired lately even though you sleep enough, I suggest looking at your profile in the mirror. A faint shadow under the cheekbone may be a sign that side cheek hollowing has begun.
The question I hear most often from people who visit for side cheek hollowing is whether combining Oligio XM and Juvelook Volume creates synergy. My answer is that it is generally a well-matched combination. However, depending on the shape of the hollowing, I sometimes recommend McCoom instead of Juvelook Volume, so this article also explains why.
Oligio XM is a lifting device that combines radiofrequency and ultrasound in one machine. The dermis is handled by the radiofrequency G mode and X mode, while the deeper layers and the SMAS are divided between the ultrasound 3.0 mode and 4.5 mode. Thanks to this configuration, Oligio XM is regarded as lifting that contracts loosened tissue and firms the skin.
Side cheek hollowing, however, is a slightly different concern. It is closer to that area being empty than to tissue moving downward. When side cheek fat decreases with age or weight is lost quickly, the side cheeks often hollow first, and if the overlying skin also thins, the same depth of hollowing casts a darker shadow.
If you only apply heat while leaving the volume loss as it is, the skin may become firmer but the shadow under the cheekbone may not disappear. Using strong energy on someone with little cheek fat also risks making the face look even more gaunt. That is why I do not answer side cheek hollowing with lifting alone; I believe synergy starts from thinking about tightening treatments and filling treatments separately.
Filling option one, Juvelook Volume
When it comes to filling the side cheeks, many people think of Juvelook Volume first. The main ingredients of Juvelook Volume are PDLLA and hyaluronic acid, and because its particles are relatively large among collagen boosters, it is introduced as a product injected into tissue layers deeper than the skin.
Juvelook Volume is a choice weighted toward volume, supporting the hollow area from below. In actual consultations, though, I quite often see side cheek hollowing for which Juvelook Volume is not the best option.
Filling option two, side cheek hollowing that suits McCoom better
The product I bring up as an alternative for such hollowing is McCoom. Some of you may be hearing the name for the first time. The main ingredient of McCoom is PLLA, and it is classified as a collagen stimulator. It is used to induce new collagen within the skin to improve elasticity and texture together, and it can also be delivered along with devices such as the Potenza pumping tip.
The side cheek hollowing for which I think of McCoom is not deeply sunken but shallow and widespread, with thinning skin above that has also become rough in texture. For this kind of hollowing, firming the density of the skin to lighten the shadow often suits more naturally than adding a lot of volume. I consider reviving the skin as a whole just as important as filling.
On the other hand, if the side cheek is deeply sunken and the volume loss is large, other methods are reviewed as well. This does not mean either Juvelook Volume or McCoom is superior, but that the right one differs with the depth of the hollow and the condition of the skin. Also, unlike filler, which creates volume immediately on injection, both Juvelook Volume and McCoom fill in gradually while collagen forms, so it is best not to judge by how things look right after the procedure.
Allocation that creates synergy in an Oligio XM combination
Adding two treatments does not automatically create synergy; where, how much and in what order each is used decides the result. So before side cheek hollowing treatment, I divide the face into three zones: the hollow side cheeks that need filling are the zone to focus on, areas such as the temples and around the eyes where blood vessels run and bone is close are the zone to protect, and areas where volume sits nicely are the zone to preserve.
Oligio XM energy is allocated mainly to the sagging jawline and face line, and deep-layer energy is kept to a minimum on the hollow side cheeks. When filling with Juvelook Volume or McCoom, I also do not go beyond the degree of hollowing. Whether to do both on the same day or on separate dates is not fixed at the consultation stage.
When injection stimulation is added to heat stimulation, swelling and redness can last longer for some people, so I tend to decide conservatively after seeing the skin on the day of the procedure. Before the procedure, I examine skin density and condition with an AI skin measurement device and other methods, and after the procedure I review progress several times to adjust the next step. When you see a doctor, I recommend asking whether filling or lifting should come first for your side cheek hollowing.
In short, even a combination with the same name, adding Juvelook Volume or McCoom to Oligio XM lifting, can lead to very different results depending on which zone of the face each treatment is placed in. In side cheek hollowing treatment, allocation matters more than the strength of energy, and the more it is divided to fit the zones of your face, the more natural the result tends to be.
Frequently asked questions
My side cheeks are hollow. Can I just get lifting?
Side cheek hollowing is often caused more by volume loss than by sagging, so simply pulling things up tends to leave the shadow under the cheekbone as it is. If cheek fat is already scarce, strong energy in the deep layers can make the face look even thinner, so I recommend considering a filling treatment such as Juvelook Volume or McCoom alongside it.
My side cheeks hollowed after a diet. Will they fill out again if I gain weight?
Gaining weight may add some volume to the face, but there is no guarantee that the lost areas will be filled in the same way again. We first look at the current depth of the side cheek hollowing and the thickness of the skin before deciding on treatment.
Do collagen injections like Juvelook Volume or McCoom fill out right away?
Both products work through the skin producing new collagen, so volume tends to build slowly. It is more accurate to evaluate the change over several weeks rather than in the mirror on the day of the procedure.
Visiting and consultation
O.N Clinic is located near Gangnam Station, so it is fairly easy to reach by subway.
If you are considering combining Oligio XM and Juvelook Volume for side cheek hollowing, organizing before your visit when your side cheeks began to hollow, any recent weight change and your past treatment experience makes the consultation smoother. If you have any questions, feel free to reach us through Chat with us now.
Written by Dr. Oh Seung-min (Representative Director of O.N Clinic, graduate of Seoul National University College of Medicine, Academic Committee Chair of the Korean Society for Laser, Skin and Hair). You can find his full background on the medical team page. First published 2026-10-26, last reviewed 2026-11-10
This article is for general information only, and the appropriate treatment and results may vary depending on each individual's condition.