Cheek Hollowing After Jaw Botox?

Since the volume of the masseter muscle can only be reduced with square jaw Botox, it is a highly cost-effective and excellent method for creating a V-line.

Actual Causes and Solutions

There is one question that people considering jaw Botox ask the most.

‘Will my cheeks look sunken if I get jaw Botox?’

Many people worry about this because of reviews they read online.

To give you the conclusion first:

👉 It is extremely rare for Botox itself to reduce fat and cause cheek hollowing.

Once you understand the reasons behind this, you will see there is no need to worry.

1. Botox acts on ‘muscles’, not fat

Key Stages

1️⃣ Nerve terminal binding

Botulinum toxin binds to receptors at the motor nerve terminals.

2️⃣ Cellular uptake (endocytosis)

The toxin enters the nerve cell.

3️⃣ Light chain activation

It acts as an enzyme in the cytoplasm.

4️⃣ Cleavage of SNARE proteins

Specifically, it cleaves SNAP-25.

5️⃣ Blockade of acetylcholine release

Neurotransmission is blocked at the neuromuscular junction.

→ Result

Inability to contract muscles (temporary paralysis)

Botulinum toxin paralyzes the muscle by inhibiting the secretion of acetylcholine.

**Simply put, the action of Botox is very straightforward.

✔ Blocks nerve transmission

✔ Reduces muscle contraction

✔ Decreases muscle size

In other words, it is a medication that only acts on muscles.

It has no effect on melting or reducing fat.

Therefore, from a medical perspective,

Jaw Botox → Fat reduction → Cheek hollowing

This sequence of events is highly unlikely to occur.

2. Then why does it feel like the cheeks have hollowed?

In reality, it is mostly due to other reasons.

① Pre-existing side cheek hollowing becomes visible

One of the first fat layers to deplete in the human face is the side cheek (mid cheek).

Especially

Under the cheekbones

Between the front cheek and the jaw

Fat in these areas naturally decreases with age.

If you get jaw Botox in this state,

✔ The jaw muscle shrinks

✔ The facial line becomes slimmer

And the existing hollowing can become more noticeable.

In short, it is not caused by Botox, but rather the underlying structure being revealed.

② Optical illusion caused by a change in facial balance

② -1. Cases where side cheek hollowing, nasolabial folds, and marionette lines appear similar after square jaw Botox, but the midface looks relatively longer, and the center of gravity shifts upwards, making the side cheeks feel relatively sunken.

When you receive square jaw Botox,

The jaw muscle shrinks, reducing the width of the lower face.

At this time, the center of gravity and proportions of the face change.

Before

Lower face is wide and strong

Facial center of gravity is lower

After

Jaw width decreases

Facial center of gravity shifts upwards

So even though there hasn't been a significant actual change,

✔ The midface appears longer

✔ The side cheeks may feel more sunken.

In other words,

It is not ‘actually sunken’,

But rather it appears that way due to the shift in facial balance.

As the square jaw reduces, the face becomes smaller, but the midface is relatively emphasized, which can make the side cheeks look empty.

=> Considering the sunken and protruding areas, you can achieve overall facial proportion by applying volume treatments to the sunken areas and using Ultherapy/LinearZ to refine the protruding areas!!

② -2. Issues with skin elasticity and fat volume

Another case involves skin density and elasticity issues.

This is especially common in people who have:

Low fat in the side cheeks

Weak skin elasticity

Hollowing under the cheekbones

If square jaw Botox is performed in this state,

✔ Support in the lower face decreases

✔ Lack of skin elasticity

✔ Existing hollowing is further emphasized

Therefore,

Side cheek hollowing

Nasolabial folds

And marionette lines may feel more visible.

The key point is

That Botox does not reduce fat; rather, the pre-existing structure simply becomes more apparent.

=> This can be resolved with collagen booster treatments that enhance lifting, tightening, and skin density.

3. So, this is how it is handled in actual practice

Experienced clinics do not perform jaw Botox as a standalone treatment.

Especially in cases where the following are observed:

✔ Side cheek hollowing

✔ Hollowing under the cheekbones

✔ Decreased front cheek volume

Complementary treatments are considered alongside it.

For example,

Fillers

Sculptra

Radiesse

Lifting lasers

By doing this,

✔ Facial balance improves

✔ The effects of jaw Botox look much more natural.

4. Why combining jaw Botox with side cheek volume enhancement is important

Simply reducing the jaw does not make a face beautiful; balance is what truly matters.

With this combination,

✔ The face appears smaller

✔ It looks natural without any hollowing

✔ Dimensionality increases

The results are significantly better.

Therefore, in practice, a design that considers volume alongside jaw Botox is much more important than Botox alone.

5. The most common explanation given during actual consultations

Patients often say:

‘Doctor, I am worried my cheeks will look sunken after getting jaw Botox.’

In these cases, I explain it like this:

‘Botox does not reduce fat.

However, areas that were already sunken may become more visible, so it is best to fill them in together if necessary.’

Approaching it this way yields natural results and much higher satisfaction.

Summary

✔ Jaw Botox does not reduce fat

✔ Most cheek hollowing is due to pre-existing structures

✔ Side cheek fat naturally decreases over time

✔ It is crucial to consider facial balance when getting jaw Botox

Therefore, an overall facial design is more important than a treatment that solely focuses on the jaw.