Why I leave the final 0.1 cc: finishing facial asymmetry treatment

"Please make sure the filler is not obvious." "I really don't want to look unnatural."

These are the requests I hear most often in filler consultations.

First, the two sides of a face are naturally different. Perfect symmetry is neither achievable nor necessarily desirable; it can look unnatural. The aim is not to make both sides identical, but to prevent them from looking noticeably different.

I tend to leave the last 0.1 cc in reserve. After the main filling is done, I ask the patient to sit for a few minutes and reassess. On some days, those few minutes change my judgment.

Is 0.1 cc really noticeable?

If you ask, "Does such a tiny amount actually make a difference?", my honest answer is that hardly anyone can recognize a 0.1 cc difference immediately after treatment. Since 1 cc is about 1/5 of a teaspoon, 1/10 of that is not a visually striking amount. Yet there is a reason to adjust it. A face is not finished in a single front-facing photograph. Light and shadow change with every smile, word, and turn of the head. In daily life, a face seen obliquely during conversation or caught incidentally in a photograph is far more common than a still frontal view in the mirror. A subtle imbalance invisible from the static front can suddenly become apparent at a particular angle or with an expression. As swelling settles and filler integrates into tissue, that difference may become a little clearer. This is why the reference should be the face after swelling settles at 2 weeks and the face in everyday expression, rather than satisfaction immediately after treatment. That 0.1 cc is reserved for those moments.

Not identical, but not noticeably different

This is not limited to filler. Dividing Botox units between the two sides and deciding thread direction and number in a thread lift ultimately involve the same issue: not making both sides identical, but making them appear balanced. These may sound similar, yet they are entirely different tasks. A human face is naturally asymmetrical. Bone shapes differ on the two sides, and muscle development varies with chewing and expression habits. Trying to create ruler-perfect symmetry can produce a face that no longer looks like that person. Even nasolabial folds rarely have identical depth on both sides. One side is commonly a little deeper depending on habitual smiling direction, side-sleeping, and chewing preference. Automatically adding more to the deeper side is not the answer; one must also consider how expression will move after filling. Measurements are therefore a reference, while my final judgment is visual. I move between front and side views, smiling and neutral expressions, to find a natural balance for that face. Balance of appearance rather than numerical symmetry is what I check in the final few minutes.

A criterion for stopping, not for adding more

You may worry, "Does that mean you keep adding little by little?" Please do not misunderstand: paying attention to 0.1 cc does not mean injecting a lot. It means the opposite. Overambition with filler leads to an unnatural look, and excessive injection increases the possibility of complications. I therefore plan the total conservatively and scrutinize its distribution. Should another 0.1 cc go on the left, or should both sides stop there? Measurements alone cannot decide this, because the visible effect of the same 0.1 cc differs with skin thickness and tissue elasticity. In consultation, I prefer a plan that begins slightly conservatively, then, if necessary, supplements after assessing progress 2–4 weeks later when swelling settles. It is slower than filling everything at once, but faster than reversing an overfilled result. I believe deciding to stop when one could add more is harder and more important than deciding to add.

Why I do not delegate that judgment

People comparing filler consultations in Cheongdam often say the explanations sound similar everywhere. I believe the distinction lies not in the explanation but in the final few minutes. That is why I personally handle consultation, design, injection, and the finishing assessment at LUNN Clinic. The expression habits observed during consultation, tissue response during injection, and left–right balance at the end must come together in one clinician's view to make that 0.1 cc judgment possible. Of course, filler may cause temporary bruising or swelling, and results and duration vary between individuals. Within those limits, the clinician's responsibility is to refine what can be controlled until the end. Deciding whether to use 0.1 cc takes only a few minutes at most. But I believe not skipping those minutes defines one's approach to care.

If you are considering treatment for facial asymmetry, I recommend asking about finishing time rather than just injection time. Whether there is a reassessment after filling makes a difference to the result.

Related article: How to recognize a good filler clinic: 3 planning principles Related treatment information: Filler