Why You Need to Determine Whether Acne Red Marks Are Pigment or Blood Vessels Before Choosing a Laser

Has your acne calmed down,

but left only marks behind?

Hello. I am Dr. Lee Yoo-deuk, and I care for patients' skin at Ezhim Dermatology Clinic in Gangnam.

A patient in their late 30s whom I met in the consultation room some time ago has stayed in my memory. The acne itself had subsided to some extent, but the red marks left behind would not fade at all and were difficult to cover even with makeup. They were very distressed.

After looking into various options and searching for “acne red mark lasers,” they became even more unsure about what to choose because one place recommended one laser while another said a different treatment was better.

Perhaps some of you reading this are feeling the same way. Today, drawing on the conversation I had with that patient, I would like to explain why it is important to first understand “what kind of mark you have” rather than deciding “which laser to undergo.”

The nature of the marks left behind after acne settles

Even after acne has calmed down,

the skin often retains

a record of what happened.

Red marks develop when blood vessels remain enlarged in areas where there was inflammation,

or when pigment settles within the skin.

It may be easiest to understand if you think of how the area around a newly healed wound

can remain flushed for a while.

In most cases, the marks slowly become lighter over time,

but because there are individual differences, it is also known that they may remain unchanged even after several months.

In particular, repeatedly touching the marks or frequent exposure to UV rays

can cause them to become darker or last longer.

The acne has clearly subsided, but when only the redness remains,

you may find yourself repeatedly checking your reflection and photos, thinking, “It looks like it has healed, so why does my face still look flushed?”

I encounter that frustration in the consultation room every day,

and I know that it is far from insignificant.

Even red marks can have different roots

Although they may look like the same red marks on the surface, their causes

can generally be divided into two categories.

One is vascular redness that shows through because of enlarged blood vessels,

and the other is a pigmented mark that appears reddish or brownish

because melanin pigment remains.

It may be easier to distinguish them if you imagine a red curtain reflected in a window

and a stain absorbed into the glass itself.

What shows through and what has soaked in

would require different ways to remove them, right?

Therefore, when considering a laser for acne red marks,

the first thing you need to do is not decide on the name of a treatment,

but examine which type your mark is more similar to.

Choosing the type of light that matches the underlying pattern

For vascular redness, IPL, which uses light across a broad range of wavelengths, is commonly used.

It is known to work by selectively responding to enlarged blood vessels and softening the appearance of redness.

If pigment is also present, dual toning, which focuses on pigment using specific wavelengths, may also be considered.

For people with a combination of both patterns, treatments may be combined depending on the condition of the skin.

It may be easiest to understand if you picture light sending a gentle signal only to enlarged blood vessels or remaining pigment,

while disturbing the surrounding healthy skin as little as possible.

Regardless of which laser for acne red marks is used, rather than promising a dramatic change after one treatment,

it is generally more natural to expect a gradual brightening process over several sessions spaced a few weeks apart.

Red-toned marks are known to tend to respond somewhat earlier than brown marks.

What I told that patient

I did not begin by mentioning the name of a treatment to the patient I mentioned earlier.

When I carefully examined the marks with a magnifying glass, the vascular tendency, with prominent redness, was somewhat stronger.

So rather than listing the types of lasers for acne red marks, I first explained the nature of the marks that remained,

the expected course, and how many sessions might be appropriate before assessing the progress.

I remember the patient looking as though some of their confusion had eased when I explained that “understanding your own skin accurately” comes before “what treatment you receive.”

They said that they had heard different explanations at every clinic and did not know what to believe,

and that simply having their marks explained as they actually were made them feel much more at ease.

Of course, during the treatment, you may experience a stinging sensation or warmth that feels like a light snap from a rubber band.

If needed, we apply numbing cream in advance to help reduce discomfort.

Being honest about these sensations and explaining them beforehand is also one of the principles we strive to uphold.

What matters even more after light treatment

In fact, it would not be an exaggeration to say that half of mark care takes place after the treatment.

Because skin that has received light treatment becomes sensitive to UV rays for a while,

carefully applying sunscreen is especially important.

For several days immediately after treatment, it is best to postpone saunas, jjimjilbangs, and strenuous exercise,

and avoid forcibly removing any flaking skin that appears.

When this type of care supports the treatment, the results often continue more smoothly.

On the other hand, if aftercare is neglected, marks that had gradually lightened may become darker again.

This is something I always emphasize in the consultation room.

Adequate sleep and moisturization, along with the small habit of not frequently touching the marks with your hands, come together to form a strong protective barrier that helps preserve the changes achieved through treatment.

To become a place you can trust for a long time

I believe that a comfortable-looking face lasts longer than an excessive change.

That is why I see laser treatment for acne red marks not as a process centered on impressive equipment names,

but as a process of first understanding the root of each mark and finding the approach that suits it.

Through honest consultations and proven treatments,

I will be here to help people whose red marks have caused them to feel self-conscious move through their days with slightly lighter steps.

I hope this post has provided a small clue to help untangle the concerns that have felt overwhelming.

FAQ · Answers directly from Dr. Lee Yoo-deuk

Q1. My acne has completely healed, so why are only the red marks left behind?

A. Red marks are skin “records” that develop when blood vessels become enlarged in areas where there was inflammation,

or when pigment remains.

You can think of them as similar to the flushed color that remains around a healed wound for a while.

They usually fade gradually, but because there are individual differences, they may remain for a long time in some cases.

Q2. Are red marks and brown marks managed differently?

A. Yes, because they have different roots.

The wavelengths of light to which redness caused by visible blood vessels and marks containing pigment respond are different.

It is therefore best to first distinguish the condition and then decide on the approach.

When both patterns are present, treatments may be combined and assessed accordingly.

Q3. They may fade if I consistently use only skincare products. Do I really need help from a dermatology clinic?

A. Mild marks may improve with home care.

However, if they remain unchanged even after using several products, examining the nature of your marks with a magnifying glass and taking an approach suited to them may help reduce the time spent trying random options.

Before deciding “what to apply,” it is important to know “what remains.”

Q4. I heard that red marks improve faster than brown marks. Is that true?

A. In general, red-toned marks are known to respond somewhat earlier than brown-toned marks.

However, individual differences depend on the depth of the marks and the condition of the skin,

so we recommend calmly observing the progress over several sessions.

Ezhim Dermatology Clinic · Dr. Lee Yoo-deuk

📍 Location

Room 502, 5th Floor, 429 Gangnam-daero, Seocho-gu, Seoul (Seocho-dong, Dongil Building)

· Near Gangnam Station and Sinnonhyeon Station

📞 Phone 02-567-5900

🕒 Hours

· Monday, Tuesday, Thursday, Friday 10:00–19:00 · Saturday 10:00–17:00 · Lunch break (weekdays) 13:00–14:30 · Closed Wednesdays, Sundays, and public holidays

Located between Gangnam Station and Sinnonhyeon Station, it is a convenient place to stop by and discuss your skin concerns while you are in the area.