During filler consultations, I often hear that people want to fill in areas that look sunken. Some come to us feeling concerned that even after multiple filler treatments elsewhere, they did not get the look they wanted. Hearing these stories always makes me think that the outcome of filler depends on where and with what design it is placed, rather than how much is injected.

What matters more than the volume

If we only view filler as a way to add volume, we miss something important. Rather than the amount used, where and in what direction that amount is placed shapes your impression. Even if the same amount is injected into the same area, the result can differ depending on how the flow of facial lines and the direction of your expression are read.

That is why Rezero Clinic views filler not simply as a filling procedure, but closer to a design process that assesses the overall balance of the face and fills in sunken areas with careful planning.

What kind of treatment is filler?

Filler is a substance used to fill in sunken or lacking areas. It is divided into several types based on the material, and the outcome depends on carefully planning which spot to fill and in which direction.

Filler is often confused with Botox, but the two treatments have different purposes. While Botox is an injection focused on delaying and preventing wrinkles from settling, filler is closer to filling in areas that are already sunken.

The basis of filler design: facial structure of the skin, fat layer, and SMAS layer

When filler is considered

• When specific areas look sunken due to a loss of volume

• When you want to gently refine the overall balance of your facial lines

• When you feel your expression looks a bit tired over time

Conversely, there are times when Rezero Clinic recommends against filler and sends patients home. If you have already had multiple repeated filler treatments, additional procedures can be a burden, so we may suggest waiting. If it is better to observe your progress rather than filling right away, we suggest postponing the treatment.

What to consider with fillers

One thing to consider is downtime. Downtime is the time it takes to return to daily life after a procedure, during which bruising or swelling subsides and precautions are managed.

• Choice of material — Materials used over a long period with recognized safety often have a reliable foundation of evidence. It is also important to choose physical properties suited to the treatment area and purpose. For example, we select soft fillers for lips to preserve natural movement, and highly supportive fillers for areas like the tip of the chin where a clear shape is needed. We determine the appropriate material by comprehensively considering these characteristics and the anatomical location.

• Downtime — The recovery period can vary depending on the area and individual condition.

Rezero Clinic prioritizes planning to fill the right spots with just the necessary amount, rather than relying on fancy names.

How is the filler design decided?

How is that design decided? Rezero Clinic determines the direction of the filler through a structure called cross-consultation. Medical judgment begins with the doctor's diagnosis. After presenting options on how to approach a certain area, we adjust the finer details through consultation.

Since fillers can express slightly different textures depending on the material, we also decide which material to use based on the agreed design. This is not a structure where a consultant decides the direction and the doctor only performs the procedure, but a method where the doctor diagnoses first and works through the approach together with you.

Cross-consultation: A process where the doctor, consultant, and patient decide the direction together

Rezero Clinic Consultation Room: A space where diagnosis and consultation take place

Side effects and precautions

As with all medical procedures, fillers can cause side effects. Bruising, swelling, redness, and pain may occur after the procedure depending on the individual, and these reactions usually tend to resolve over time.

A particularly important consideration in filler procedures is the relationship with blood vessels. Several important blood vessels are intricately distributed across the face, and there are areas, such as the glabella and around the nose, that require extra caution. Because fillers entering blood vessels or affecting blood flow can lead to serious complications, understanding the location and path of blood vessels and deciding where, how deep, and how to inject is very important.

Therefore, a filler procedure is not simply a process of filling volume into a desired area, but also requires a process of determining a safe injection location and method while considering facial anatomy and blood vessels.

It is also important to inform the medical staff of your skin condition, underlying diseases, and medications you are taking through sufficient consultation before the procedure, and to receive guidance on precautions and how to respond if adverse reactions occur.

The Rezero Clinic approach

We are often asked if filler is a treatment where the more you put in, the better it gets. However, we believe that the outcome of filler depends on the design, not the volume. You can achieve a more natural look when it is filled as much as needed, in the necessary spots, and within the balance of the entire face.

Even if you come with the same concerns, the cause and the required approach differ for each person. Before deciding what to add, care at Rezero Clinic starts by asking what change is truly needed right now. Sometimes, waiting a bit longer without filling is the better choice. Our principle is to diagnose first and design together before filling.