"Can't you just zap a mole off completely in one go with the laser?"
"I'd like to clean up the milia and a small scar at the same time — can it be done in one go?"
These are questions people thinking about moles or lesions with the CO2 laser ask all the time.
Hello, I'm Director Kwon Si-jin & Yoon Ju-hyun at DA Clinic Myeongdong ^^
We're getting ready to open our doors in Myeongdong soon, and since so many people have been asking about moles, milia, and scars ahead of our opening, we wanted to put together this overview for your information first.
Let me start with the bottom line. With moles or lesions, it's not 'deeply in one go' — you have to remove them after diagnosing them and matching the depth, so that less of a mark is left.
Read this for just 3 minutes and you'll see the standards worth keeping in mind, wherever you have it done.
The CO2 Laser Is a Device That 'Burns Off Moisture to Shave Away Tissue'
The CO2 laser is an ablative laser at a 10,600nm wavelength that's absorbed by the moisture in the skin and precisely vaporizes only the target tissue.
To put it simply, like the Photoshop eraser tool that picks out and wipes only the pigment, it works on the principle of shaving away lesion tissue one layer at a time ㅎㅎ
That's why it's used to precisely remove raised lesions that protrude, such as moles, skin tags, milia, and warts.
If you switch the same device to 'fractional mode', it doesn't shave anything away but instead gives micro-stimulation to the dermis, and is also used to refine the texture of pores and scars. So one device holds two jobs.
First, It's Not 'Deeply in One Go' but 'Matched to the Depth'
Many people think, "Since I'm removing it anyway, digging it all the way out in one go would be cleaner."
But moles vary in depth, so digging a deep mole all the way out in one go raises the risk of it being left as a sunken, depressed scar in that spot.
Conversely, if the output is too weak the lesion is incompletely removed and a risk of recurrence arises.
So what matters isn't going deep no matter what, but diagnosing the depth of the mole and the thickness of the skin and matching the output and mode. Removing deep moles in 2–3 stages tends to be safer. (There is individual variation)
Second, Before Removing It, You Have to Check 'Whether It's Really a Mole'
This is a part people miss more than you'd think.
Even if it looks like a mole on the surface, it could be another pigment condition or a lesion that needs diagnosis.
So rather than reaching straight for the laser without thinking, we think it's right to go through a step of checking it first with a skin diagnostic device.
This is something worth taking care of wherever you have it done. "Please check what this is first" is ultimately a safer order than "Please remove it quickly."
Third, the Result Comes Down to 'Scab Care'
After removing a lesion with the CO2 laser, a scab forms in that spot for about 1–2 weeks and then falls off naturally.
This is where the result really diverges. If you pick at the scab with your hand because it's bothering you, pigmentation or a mark is left easily in that spot.
Right after the scab falls off, the pink new skin looks slightly sunken, but it fills in over time, so you don't need to worry too much.
And the redness fades slowly over 3–6 months. Doing your UV protection well during this period is the key to preventing pigmentation.
Honestly, You Need to Be More Careful in These Cases
The CO2 laser isn't an all-purpose fix for every lesion.
Those with a keloid-prone constitution, those who are pregnant, and those with an active infection in the treatment area are safer to postpone the treatment and consult first.
Also, deeply pitted acne scars have a depth limit with the laser alone, so there are times when other approaches such as subcision need to be considered alongside it.
And there are lesions, like syringomas, that are approached through steady, ongoing care rather than being finished cleanly in one go. So rather than reaching for the laser no matter what, knowing the direction that suits your own lesion comes first.
Frequently Asked Questions
Q. Can a mole be removed completely in one go?
A. When removing a mole with the CO2 laser, going deep in one go isn't unconditionally better. A shallow, superficial mole can be tidied up cleanly in one session, but digging a deep mole all the way out in one go raises the risk of a depressed scar being left. So removing deep moles in 2–3 stages is safer. Because it's split up, it can look like a recurrence, but it's often tidied up with an additional treatment. The depth of a mole differs from person to person, so deciding the number of sessions after diagnosis comes first.
Q. When does the scab fall off, and will a scar be left?
A. After a CO2 laser treatment, a scab usually forms for about 1–2 weeks and then falls off naturally. The most important thing here is not forcing the scab off. If you pick at it with your hand, pigmentation or a mark is left easily in that spot. Right after the scab falls off, you may see pink new skin and it can look slightly sunken, but it fills in over time. After that the redness fades over 3–6 months, so please keep up UV protection and moisturizing steadily. (Recovery speed varies by individual)
Q. Can pores and scars also be done with the same laser?
A. The CO2 laser's fractional mode has a different purpose from the ablative mode that removes raised lesions like moles and skin tags. Rather than shaving a lesion away, it works by giving the skin micro-stimulation to induce dermal collagen regeneration, so it's used to refine the texture of pores and faint scars. That said, it doesn't change dramatically in one go — usually the texture is tidied up slowly by accumulating around 3–5 sessions at intervals of 4–6 weeks. Deeply pitted scars have a limit with the laser alone, so we sometimes consider other approaches alongside it.
In Closing
If I sum up today's content in one line, it's this.
The CO2 laser — rather than 'deeply in one go', it's 'diagnosis, staged removal by depth, and scab care' that make the result.
This isn't an article recommending a treatment, but an informational article we've put together for your reference while preparing to open.
DA Clinic Myeongdong is set to open soon. We'll share news of our opening and treatment information first on our blog and Instagram ^^
Thank you for reading to the end. This was Director Kwon Si-jin & Yoon Ju-hyun at DA Clinic Myeongdong.
This column is an informational article intended to provide general medical information; the effects and side effects of treatments may vary by individual. DA Clinic Myeongdong is set to open soon. (Medical Service Act Art. 56)