Underarm Laser Hair Removal:

How Many Sessions Does It Take?

A Realistic Breakdown

Just when it feels like spring is finally here,

the weather turns chilly again.

Clients from China

and Taiwan

used to have little interest in body hair removal —

but suddenly,

a lot of them have been getting it done lately.

(Even one session makes a noticeable difference!)

And if you're reading this...

you've probably been shaving for a while now

and are starting to think

seriously about underarm hair removal, right?

Hair removal is now a pretty mainstream procedure,

so it's easy to find reviews from people around you.

But here's where it gets tricky —

the question "How many sessions until it's completely done?"

doesn't have one simple answer.

Today, I'll break down exactly why.

💡 Key Takeaways

Q. How many sessions does it take?

A. The average is 6–8 sessions,

but it varies depending on hair density and skin type.

Q. Why was there no effect

even after 10 sessions?

A. The laser device type

or energy settings likely weren't the right fit.

Q. Can I stop partway through?

A. You can,

but completing the recommended number of sessions is better in the long run.

How Laser Hair Removal Works

Laser light is absorbed by the dark pigment in hair,

converts to heat, and destroys the hair follicle.

There's one key point to understand here.

Hair cycles through growth, regression, and resting phases —

and laser is only effective during the growth phase.

At any given time, only about

20–30% of underarm hairs are in the growth phase.

So eliminating everything in a single session

is simply not possible.

So How Many Sessions Are Realistic?

Saying "a 6-session package will finish everything cleanly"

is just an average — it doesn't apply to everyone.

To be honest,

thick, dark hair sees the best removal efficiency.

There's simply more pigment for the laser to absorb.

Fine, light hair, on the other hand, absorbs energy poorly

even at higher settings, so more sessions are needed.

👨‍⚕️ Dr. Wi Young-jin's Clinical Note:

Quite a few patients who saw little to no results after 10+ sessions elsewhere

have been satisfied with their results at our clinic.

In most cases, the energy settings

simply didn't match their hair condition.

When the same energy level is applied to both thick and thin hair —

the kind of one-size-fits-all approach common at high-volume clinics —

these subtle differences are nearly impossible to address.

Adjusting the energy level session by session is what makes the real difference.

How Long Should You Wait

Between Sessions?

The recommended interval is typically 4–6 weeks.

The reason this interval matters goes back to

the hair growth cycle mentioned earlier.

Spacing sessions 4–6 weeks apart ensures

that hairs newly entering the growth phase in between

can be effectively targeted in the next session.

Too short, and you end up stimulating the same hairs repeatedly.

Too long, and efficiency drops significantly.

What Happens

If You Stop Midway?

When results become visible around the halfway point of a package,

some patients don't return for the remaining sessions.

Any reduction in hair you've already achieved will be maintained.

Destroyed follicles don't come back.

However, if you stop while remaining follicles are still active,

you may notice that regrowth feels faster.

For long-term satisfaction,

completing the recommended number of sessions is strongly advisable.

The main drawback is cost.

That said, spreading sessions out over time can ease the financial burden,

so feel free to bring it up during your consultation.

Frequently Asked Questions (FAQ)

Q1. Does thick hair

finish faster?

A. Yes — it responds well to laser and reduces relatively quickly.

Fine, thin hair, on the other hand, requires more sessions.

Q2. How is this different from

high-volume clinics?

A. Dr. Wi Young-jin personally assesses each patient's hair condition

and fine-tunes the energy settings at every session.

Q3. If I start now,

can I wear sleeveless tops by summer?

A. Starting now, you can fit in 3–4 sessions by early summer.

It may not be complete removal, but you can significantly reduce hair density.

If you have any questions, feel free to reach out via KakaoTalk.

This has been Dr. Wi Young-jin.

✦ Further Reading

• Why you should start hair removal in winter

• Men's leg hair removal: why is it faster than beard removal?

• Folliculitis after beard removal: prevent it by following just 3 steps

• How many days should you keep DuoDERM on? A complete guide

• Hongdae Water Glow injection: 5 things you must know before treatment