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Understanding Masseter Botox Effects and How Long They Last

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 3, 2026

Hello, this is Woori Plastic Surgery. Many people seek consultation because their face looks angular or their jaw appears wide. In such cases, one relatively low-burden treatment t...

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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 3, 2026

Translated at: April 20, 2026 at 3:20 AM

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

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Hello, this is Woori Plastic Surgery.

Many people seek consultation because their face looks angular or their jaw appears wide. In such cases, one relatively low-burden treatment that is often considered is square jaw Botox.

However, rather than approaching it with the simple expectation that “the jaw will get smaller,” it is important to first understand how square jaw Botox works and whether it is suitable for your face type.

Understanding the Principles of Square Jaw Botox

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Square jaw Botox is not a procedure that reduces the jawbone.

It works by temporarily relaxing the movement of the masseter muscle, one of the chewing muscles, and reducing its use.

As muscle activity decreases, the muscle gradually becomes smaller over time, and as a result, the angular jawline becomes softer and more refined.

In other words, square jaw Botox tends to be more effective when the cause is muscle development rather than bone structure.

When Can You Notice Changes?

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Square jaw Botox does not usually produce a major change immediately after the procedure. In most cases, you begin to notice the line gradually changing over 2 to 4 weeks.

At first, you may notice that the firmness felt when clenching the jaw is reduced, and after that, the lower face often appears more refined little by little.

As such, the effect of square jaw Botox is closer to a natural refinement than to a dramatic change.

How Long Does Square Jaw Botox Last?

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Square jaw Botox is not a permanent procedure.

Although there are individual differences, the effect generally lasts about 4 to 6 months.

As muscle function gradually recovers over time, if you want to maintain the contour continuously, it can be helpful to continue the procedure at regular intervals.

A cycle of around 6 months is commonly recommended, and repeated treatments may also help prevent excessive muscle development.

To maintain the effect of square jaw Botox steadily, managing this treatment cycle is an important factor.

Does It Work for All Square Jaws?

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Not all square jaws are caused by muscles.

If the skeletal structure is more developed, it may be difficult to expect major changes with Botox alone.

In such cases, the effect of square jaw Botox may feel limited, so it is necessary to accurately determine whether the cause is muscular or skeletal before the procedure.

The approach should change depending on the cause, and an accurate diagnosis determines satisfaction.

Square jaw Botox is a procedure that softens a developed jaw muscle and gently refines the facial line. The effect appears gradually, and the duration of the result also varies depending on an individual’s muscle use habits and how well they are managed.

Rather than deciding based only on trends or reviews, it is important to first check exactly what is causing the current jaw shape and then make a plan. We hope you can find the right direction for your face through 충분한 consultation.

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