Why Shurink's 4.5mm Depth Hurts More — A Doctor Explains

Why Shurink's 4.5mm Depth Hurts More —

A Doctor Explains

Every change of season,

my consultation schedule fills up with Lifting inquiries.

"I've been wanting to try Shurink,

but honestly the stories about Pain held me back."

I hear this from so many patients.

Today, I want to walk you through exactly why that happens.

The Short Answer.

Shurink Pain scales with tip depth —

1.5, 3.0, and 4.5mm each feel noticeably different.

The Key Variable.

Anesthesia method — topical cream only vs. nerve block vs. sedation.

What We'll Cover Today.

How to determine which anesthesia is appropriate for each depth.

How Much Does Shurink Actually Hurt?

The Pain from Shurink is genuinely different

depending on which depth is being used.

This is the question I get from nearly twenty patients

every single week in my clinic.

"I've heard it's really painful — is that true?"

Honestly, there's no single answer.

The type of Pain itself changes with each tip depth.

• 1.5mm: A mild surface sting

• 3.0mm: A dull, throbbing ache that arrives a beat later

• 4.5mm: A deep Pain that resonates through bone

  (especially near the jawbone)

Why Does Greater Depth Mean More Pain?

Key Insight from

Dr. Wi Young-jin

The deeper the Shurink tip goes, the more intense the Pain.

With 30 minutes of topical anesthesia combined with Cooling,

approximately 70–80% of patients find the procedure very manageable.

Shurink is a HIFU device that concentrates energy

into a single point, generating Thermal Coagulation Points

at 65°C or above.

The Pain you experience depends on which tissue layer

those thermal points are placed in.

At 1.5mm, energy reaches the Dermis, producing a surface sting.

At 3.0mm, it reaches the subcutaneous fat layer, causing a dull ache.

The deepest setting — 4.5mm — penetrates the SMAS Layer,

and as it approaches the periosteum,

it can produce a bone-resonating sensation.

Whether the provider carefully avoids

the jawbone trigger points

can make the Pain nearly twice as intense or barely noticeable.

Key Takeaways from Dr. Wi Young-jin

• Shurink Pain differs by tip depth —

  ranging from a surface sting, to a dull ache, to bone resonance.

• Adding a nerve block to 30 minutes of topical cream

  makes even the 4.5mm depth very comfortable.

What Pain Management and Cooling Options Are Available?

In my clinic, the most commonly used option

is 30 minutes of topical anesthetic cream.

For roughly seven out of ten patients, this is sufficient.

However, for those requiring heavy use of the 4.5mm tip

or precise jawline contouring,

I recommend a nerve block (anesthetic injection).

A nerve block typically reduces perceived Pain

down to about 30–40% of baseline.

Last week, a 42-year-old patient coming in for a repeat procedure

had experienced heightened Pain during her first session due to anxiety.

After adding a nerve block, she found the entire procedure

far more comfortable.

Who Should Think Twice Before Getting Shurink?

That said, I generally do not recommend Shurink

for patients with significant sagging and very little facial volume.

The 4.5mm tip not only tightens the SMAS Layer

but also has a fat-reducing effect,

which can risk hollowing in already lean cheeks.

On the other hand, for patients with a higher BMI

and a less defined jawline,

increasing the proportion of 4.5mm shots

to achieve both fat reduction and tissue fixation is the standard approach.

3 Common Questions About Shurink Pain

Q1. It's my first time — is topical cream

really enough?

Statistically, about 80% of patients do fine with just the cream,

but two or three patients per week do opt to add a nerve block.

We'll decide together at your consultation based on how much 4.5mm is planned.

Q2. Can I just ask for fewer shots

if I'm nervous about the Pain?

I'd advise against it.

Significantly reducing the shot count produces minimal results.

It's far better to manage the Pain with a nerve block

and complete the full recommended dose —

your outcomes will be noticeably better.

Q3. Can we stop mid-procedure

if the Pain becomes too much?

We can pause, but I generally don't recommend it

due to the risk of asymmetry.

Instead, we can add a nerve block mid-session

so you can finish comfortably without interruption.

Ultimately, Shurink Pain comes down to tip depth,

and anesthesia can always be tailored to match.

In my next post, I'll break down how to determine

the ideal ratio of 4.5mm to 3.0mm shots

based on individual BMI.

This has been Dr. Wi Young-jin.

Further Reading

• Shurink vs. Ultherapy Prime — How to Choose the Right Lifting Procedure for Your Budget

• Shurink Side Effects? The Truth About Cheek Hollowing — and How to Prevent It

• Beard Hair Removal Pain — Here's How to Make It Tolerable: Anesthesia Options Explained