
DM DERMATOLOGY
Acne Laser
ACNE LASER
Acne laser:
two kinds of light aimed at
sebaceous glands and acne bacteria
The acne laser is a treatment that uses two different kinds of light to target the sebaceous glands, which make sebum, and the acne bacteria inside pores.

Acne Laser
Laser · Acne Laser
DM Dermatology uses the Capri laser for acne laser treatment. The Capri laser is an acne device that combines a 1,450 nm diode laser and 400 nm blue light in one unit. The laser light reaches the upper dermis, the layer below the skin surface, and heats the sebaceous glands. The blue light targets acne bacteria in the shallow part of the skin.
Acne forms from a combination of excess sebum, clogged pores, acne bacteria, and inflammation. Of these, the acne laser addresses sebum and acne bacteria. It is rare for acne to settle completely with a laser alone. That is why we also plan topical medicine, oral medicine, and home care.
At DM Dermatology in Apgujeong, we first examine the type of acne and the degree of inflammation before treatment. If you have many deep nodules or cysts, we may recommend medication first. The degree of change and the number of sessions needed vary from person to person.
- 1,450 nm diode laser
- 400 nm blue light
- Cooling gas
- Sebaceous glands
- Inflammatory acne
IN NUMBERS
Acne laser in numbers
Laser
1,450nm
Laser wavelength that heats
sebaceous glands in the upper dermisBlue Light
400nm
Blue light absorbed by
porphyrins in acne bacteriaInterval
3–4wk
Typical interval
between sessionsSessions
3–4sessions
Typical number
of sessions

CHECK
If you have these
acne concerns
Red, painful pimples keep coming up. Just as one spot settles, another one fills with pus next to it.
Even after I wash in the morning, by lunchtime my oily T-zone (forehead · nose) is shiny, and clogged pores keep increasing.
I use topical medicine regularly, but new pimples still appear, so I am looking for something to add alongside it.
Before I start oral acne medicine, I want a consultation first on the right approach for my acne.
Red or brown marks remain wherever pimples filled with pus, and every new pimple worries me.
If you have many deep, hard nodules or cysts, we consider medication first.
HOW IT WORKS
The targets
of the two kinds of light
The 1,450 nm laser is invisible mid-infrared light. Water in the skin readily absorbs this wavelength, and it turns into heat. So the laser is aimed to concentrate heat in the upper dermis, where the sebaceous glands sit. The goal is to reduce the activity of the sebaceous glands with heat and lower sebum production.
While the deeper area is heated, the skin surface (epidermis) also receives heat. The Capri laser cools the epidermis with a very brief spray of cooling gas along with the laser. Because it cools the surface while heating below, it does not peel away the skin surface.
Blue light is visible light. Acne bacteria (Cutibacterium acnes) produce substances called porphyrins. Porphyrins readily absorb blue light at around 400 nm. Porphyrins that absorb the light produce reactive oxygen species, and these damage the acne bacteria.

- 1
1,450 nm laser Invisible mid-infrared light. It is absorbed by water in the skin and turns into heat, which concentrates in the upper dermis.
- 2
Cooling gas Sprayed very briefly along with the laser to cool the outermost layer of the skin (epidermis). It reduces heat buildup at the surface.
- 3
Blue light Visible 400 nm blue light. It reaches the shallow part of the skin and targets acne bacteria in the pores.
- 4
Comedo · acne bacteria A comedo is a plug of dead skin and sebum that blocks the pore opening. Acne bacteria multiply inside the blocked follicle, and blue light targets the porphyrins these bacteria produce.
- 5
Sebaceous glands Glands attached beside the follicle that make sebum. This is where the heat of the 1,450 nm laser is aimed.
DEPTH
How deep the two kinds of light reach
The 1,450 nm laser and blue light differ in how deep they reach and what they target. So one does not replace the other.
- EpidermisLayer cooled by the cooling gas
- Shallow dermisWhere blue light reaches
- Upper dermis · sebaceous glandsWhere laser heat concentrates
- Deep dermisCollagen fiber layer
- Subcutaneous fat
Where the 1,450 nm laser's heat concentratesThe upper dermis, where the sebaceous glands sit.
- 1,450 nm diode laser · upper dermis
An invisible mid-infrared laser. It is absorbed by water and produces heat, warming the sebaceous glands in the upper dermis. It is used for inflammatory acne in oily skin.
- 400 nm blue light · shallow skin
Visible blue light. It targets porphyrins in acne bacteria inside the follicles. It is used for red papules and pus-filled pimples, and it is not well suited to deep nodules or cysts.
Layer thicknesses are proportions for illustration. Actual skin thickness and the depth of the sebaceous glands vary by facial area and by person.
DEVICES
Device used for the acne laser

Capri
Capri
1,450 nm diode and 400 nm blue light
An acne treatment device that combines a 1,450 nm diode laser and 400 nm blue light.
- 1,450nm
- 400nm
- Acne
This is the Capri laser that DM Dermatology has on site. The intensity and session plan are decided after an examination.
PROCESS
Acne laser
treatment steps
Each visit follows the steps below. Whether to use numbing cream is decided during the examination.
Consultation · skin examination
We look at the type of acne, the degree of inflammation, and your sebum. We also ask about oral and topical medicines, pregnancy, and any recent tanning. If you have many deep nodules or cysts, medication may need to come before the laser.

Cleansing · numbing cream
We thoroughly remove makeup, sunscreen, and sebum. Pus-filled pimples are washed gently, without rubbing. If you are worried about pain, numbing cream is applied. After 30–60 min of waiting, it is wiped off completely before treatment.

Laser · blue light treatment
You wear protective glasses to shield your eyes from the light. Each time the 1,450 nm laser fires, cooling gas comes out with it, which feels cold and stinging. Blue light is also applied to acne areas. If it feels hot or very painful, please tell us right away.

Soothing · going home
We finish by applying a soothing product, moisturizer, and sunscreen. If warmth remains, a cold pack can cool the skin. We tell you when you can start washing your face and wearing makeup. The next visit is usually 3–4 weeks later.

INFORMATION
Treatment info
to check before your visit
- Procedure time
- Full face about 10–30 min
Time to apply numbing cream and wait is extra - Numbing
- Numbing cream 30–60 min
Treatment feels hot and stinging, so if you are worried about pain, it is applied beforehand - Recovery
- Redness and warmth a few hours–1 day
If swelling occurs, it may last 1–2 days - Daily life
- Makeup from the next day
On the day, wash gently with lukewarm water. For 1–2 days, skip saunas, hot spas, intense exercise, and alcohol - Interval
- 3–4 weeks apart
We do the next session once redness and skin reactions have settled - Recommended sessions
- 3–4 sessions
A few weeks after the last session, we review progress and decide whether to add more
The values above are general guidelines. DM Dermatology sets your treatment schedule after looking at your skin, and it may differ from person to person.

Caution
Skin care and precautions
after the acne laser
For a day or two after treatment, your skin is sensitive to heat and sunlight.
- 01Wash gently with water only on the first day
On the day of treatment, wash gently with lukewarm water. Put off foamy cleansers and scrubs until the next day or later.
- 02Ease tightness with moisturizer
Your skin may feel dry and tight after treatment. Apply a thin layer of a moisturizer that does not clog pores (non-comedogenic) often.
- 03Avoid tanning
Keep your skin from tanning during your course of treatment. When you go out, use sunscreen of SPF 30 or higher together with a wide-brimmed hat.
- 04Avoid heat for 1–2 days
Hot spas (jjimjilbang) and saunas, alcohol, hot baths, and sweaty exercise can make redness last longer. Skip them for 1–2 days after treatment.
- 05Pause exfoliating ingredients
Pause exfoliating ingredients such as retinol and AHA · BHA until redness settles. Before you stop any prescribed medicine, ask the doctor first.
- 06Contact us if blisters or oozing appear
If blisters or oozing appear on the treated area, or if pain and swelling keep getting worse, contact the clinic right away.
- During treatment, there is a hot, stinging pain as the inside of the skin heats up. The cooling gas also gives a brief cold feeling. How it feels varies from person to person.
- Redness, warmth, and swelling may occur after treatment. They usually settle within a few hours to a day, and swelling may last 1–2 days.
- Brown hyperpigmentation may occur. The risk is higher with darker skin or recently tanned skin. Hyperpigmentation related to the cooling gas has also been reported. It usually fades over several weeks to months.
- Rarely, blisters, burns, or scars may occur.
- Areas exposed to blue light may become dry or swollen, and skin color may change temporarily.
- There are reports that deep nodular or cystic acne became worse after blue light. For this kind of acne, medical treatment such as oral medicine is considered first.
- Acne is affected by hormones, sebum production, and lifestyle, so it can come back even after treatment.
- Please tell us in advance if you are taking isotretinoin (oral acne medicine) or finished taking it within the last 6 months. The doctor decides the timing of treatment.
- Tell us before treatment if you have a condition that makes you sensitive to sunlight (photosensitivity disorder) or use a medicine that can make you sensitive to light.
- Tell us before treatment if you are pregnant, planning a pregnancy, or breastfeeding.
- If there is a wound, infection, or eczema in the treatment area, treatment is postponed until it heals. The same applies when a cold sore (herpes simplex) has appeared.
- If you have recently tanned a lot, the risk of hyperpigmentation is higher, so we may postpone your treatment date.
※ Even with the same treatment, how much acne decreases, how long redness remains, and the number of sessions needed vary from person to person.

DM DOCTOR
A board-certified dermatologist as medical director
Personal diagnosis · Accountable care
Thorough care from a board-certified dermatologist with over 20 years of treating skin
At DM Dermatology, our medical director, a board-certified dermatologist, examines your skin in person and plans treatment around your concerns and daily life.
Dr. Shin Young-ik Medical Director · Board-Certified Dermatologist
- M.S., Hanyang University College of Medicine
- Adjunct Professor, Hanyang University
- Full Member, Korean Dermatological Association
- Clinical Fellowship in Dermatology, Jefferson Medical College (Thomas Jefferson University), USA
Care by a board-certified dermatologistPatients here are seen by a dermatologist certified by the Ministry of Health and Welfare
FAQ
01Does the acne laser hurt?
The 1,450 nm laser heats the inside of the skin, so you may feel heat and stinging. How much varies from person to person. Cooling gas comes out with the laser, so a cold feeling is mixed in. If you are worried about pain, we apply numbing cream and usually wait 30–60 min before starting. If it feels hot or very painful during treatment, tell us and we will adjust the intensity.
02How long does the acne laser take?
For the full face, it usually takes about 10–30 min. This does not include the time waiting for numbing cream. If numbing cream is applied, we wait 30–60 min before treatment. We tell you the exact time after an examination, based on how widespread your acne is.
03Can I wear makeup right after the acne laser?
Redness and warmth usually settle within a few hours to a day, and if swelling occurs, it may last 1–2 days. On the day, wash gently with lukewarm water, and start makeup the next day. Use cosmetics that do not clog pores (non-comedogenic). For 1–2 days, skip saunas, hot spas, intense exercise, and alcohol.
04How many acne laser sessions do I need?
Typically, 3–4 sessions 3–4 weeks apart. It is hard to judge the change after just one session. We do the next session once redness and skin reactions have settled, and we review progress a few weeks after the last session. We tell you the number of sessions and the interval after an examination.
05Can I get the acne laser together with other treatments?
DM Inflamed Acne care and Agnes work differently from the acne laser, so they are sometimes planned together depending on your acne. Treatment with topical or oral medicine often continues alongside as well. Scars that are already depressed are discussed separately under Scar Treatment. Whether to have them on the same day or spaced apart is decided after an examination, based on your skin.
06Can I get the laser while using acne medicine?
Yes, it is often planned together with medication. The laser handles sebum and acne bacteria, while topical or oral medicine addresses clogged pores and inflammation. We may advise you to pause retinoid ointment for a few days before and after treatment. If you are taking isotretinoin, be sure to tell us.
07Does the acne laser reduce sebum?
The 1,450 nm laser aims to reduce sebum production by heating the sebaceous glands. How much it decreases and how long that lasts vary from person to person. It does not remove the sebaceous glands, so continue cleansing and moisturizing care as well.
08Will acne stop coming back after the acne laser?
It can come back. The laser addresses the current sebaceous glands and acne bacteria, but it cannot change an acne-prone constitution or hormones. After treatment, continue home care such as cleansing, moisturizing, and sun protection, along with any medication you need. If acne increases again, we consider more treatment after an examination.
09Does it work on acne scars too?
The 1,450 nm wavelength is also used for depressed acne scars. However, the acne laser is a treatment aimed at the acne and sebum appearing now. Scars that are already depressed need different approaches depending on their depth and shape, so we discuss them separately under scar treatment.
10Can I get the acne laser in summer?
Yes. However, tanned skin is more prone to hyperpigmentation. During your course of treatment, block the sun with sunscreen and a hat. If you have recently tanned a lot, we may postpone the date. Skip heavy-sweating exercise and saunas for 1–2 days after treatment.
11How can I get the acne laser near Apgujeong Station?
DM Dermatology is at 4F, 158 Apgujeong-ro (579-1 Sinsa-dong), Gangnam-gu, Seoul. It is a 2-minute walk from Apgujeong Station (Line 3) Exit 5. When you book, we start by checking your type of acne, the medicines you use, and any recent treatments.
CONSULTATION
Consultation comes first
Before any treatment is chosen, a board-certified dermatologist checks your skin in person.
DM Dermatology, 4F, 579-1 Sinsa-dong, Gangnam-gu, Seoul
From Apgujeong Station (Line 3) Exit 5, walk straight for 50 m. 4th floor of the A Twosome Place building
- Weekdays
- am 10:00 - pm 07:00
- Saturday
- am 10:00 - pm 04:30
- Lunch break
- pm 01:00 - pm 02:00
- Sun & holidays
- By appointment only
- Subway
3Apgujeong StationExit 5
Walk straight for 50 m · 2 min on foot · 4th floor of the A Twosome Place building
- Bus
Apgujeong Station Exit 4 · Exit 32310523429
Blue bus147 · 148 · 240 · 463 · 343Green bus4211
Kwanglim Church · Hyundai High School2310323104
Blue bus143 · 240 · 345 · 472Green bus3011 · 4312 · 4318
- By car
Search in your navigation app158 Apgujeong-ro, Gangnam-gu디엠피부과의원
Use the building’s underground parking · Parking available in the building







