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How Much Can Masseter Botox Change Your Face?

우리성형외과의원Gangnam facelift l Gangnam nose surgery l Gangnam liposuction l Gangnam tummy tuck l 江南面部拉皮手術 l 江南おなかタック l 江南脂肪吸引 · 우리성형외과 임평진 대표원장 · March 26, 2026

Hello, this is Woori Plastic Surgery. When the face looks angular or the jawline appears wider, many people consider improving it with a relatively simple method. In particular, we...

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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: 우리성형외과의원Gangnam facelift l Gangnam nose surgery l Gangnam liposuction l Gangnam tummy tuck l 江南面部拉皮手術 l 江南おなかタック l 江南脂肪吸引

Original post date: March 26, 2026

Translated at: April 19, 2026 at 6:30 PM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

How Much Can Masseter Botox Change Your Face? image 1

Hello, this is Woori Plastic Surgery.

When the face looks angular or the jawline appears wider, many people consider improving it with a relatively simple method. In particular, we are often asked, “How much can Botox change the face?” Today, I’ll explain how the effect of square jaw Botox appears and summarize the range of actual changes.

What Is Square Jaw Botox?

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Square jaw Botox works by reducing the movement of the masseter muscles, which are the chewing muscles. These muscles develop through repeated use, and when Botox helps relax this movement, you can gradually expect the muscles to become smaller.

With this process, the effect of square jaw Botox does not appear all at once, but gradually over time. That is why it often leads to a soft change to the point that people around you may say, “Did you lose weight?”

A V-Line Created Through Muscle Atrophy

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After Botox treatment, muscle use decreases and atrophy gradually progresses. As a result, the line beside the jaw becomes slimmer, and an overall more refined impression is formed.

Especially if the face looked wide because the jaw muscles were developed, you can expect a more slender V-line through the effect of square jaw Botox. However, if the cause is the bone structure itself, the degree of change may be limited, so identifying the cause is important.

Why the Salivary Glands Are Also Considered

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The reason the face may look wide is not always only the muscles. If the salivary glands under the jaw are enlarged, the jawline can appear thick when viewed from the side.

In such cases, managing not only the masseter muscles but also the salivary glands together can help create a more refined contour. When this approach is combined, the effect of square jaw Botox can be expected to produce a balanced change not only from the front, but also at 45 degrees and from the side.

Recommended Candidates for Contour Botox

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Square jaw Botox is a relatively simple procedure, with less burden from incisions or a long recovery period. Since returning to daily life after the procedure is also relatively quick, many people choose it without much concern even in busy schedules.

In this respect, the effect of square jaw Botox can be a suitable option for those who want to naturally refine their contours rather than make a dramatic change.

Square jaw Botox is not a procedure that dramatically changes the shape of the face, but one that focuses on refining the contour by reducing muscle size. Therefore, rather than expecting excessive changes, it is important to understand it as a way to create a slimmer and more polished impression from your current face shape.

If you are considering the procedure, we recommend checking through a consultation how much effect square jaw Botox can be expected to have on your own facial structure.

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