Korean Dark Circle Treatment: When Under-Eye Filler Works

I'm Dr. Jong Hoon Lee, one of the doctors at Gangnam HERA in Seoul. I've been in practice for more than 25 years, co-authored the textbook LIFTINGOLOGY, and I'm a board member of the Korean Society for Aesthetic Surgery and the International Petit Medical Society. When people think of eye procedures they usually picture double-eyelid surgery, or fat repositioning surgery under the eyes. Not everyone wants surgery, so the question I hear is: is there something simpler? Filler is one of the most common answers. In this video I explain when it works — and when it doesn't.

My short answer: dark circles have several causes, and under-eye filler only helps the ones caused by a real hollow. If your dark circles come from pigment or very thin skin, filler alone will disappoint you, and a different treatment — sometimes fat grafting — is the better plan.

What is eye filler actually for?

Filling what is missing — above the eye or below it. Eye filler divides broadly into upper eyelid filler and under-eye filler. Filler, by definition, fills a lack of volume. So it suits people whose upper lids are sunken, or whose under-eyes are hollow enough to create a shadow that looks like a dark circle.

What should be checked before upper eyelid filler?

Why the lid is sunken — because only one of the common reasons is a filler problem. Some people simply have little fat in the upper lid, and the hollow makes them look tired. But I also check:

• Simple fat shortage — the case filler is designed for.
• A habit of raising the eyebrows to open the eyes, which can deepen the hollow.
• A weak eyelid-opening muscle, where the real issue is how the lid opens, not volume.

My colleague Dr. Jong Seon Kim covers upper eyelid filler in depth — including why he treats it in two sessions — in his video on eye-hollow filler.

What causes dark circles, and which ones can filler treat?

There are four common patterns, and you have to treat the cause. People say they look like a panda, but the reason differs:

• Bulging fat with a hollow below it — the classic eye bag with a groove underneath.
• A hollow without bulging — the tear trough is simply sunken.
• Pigmentation — the skin itself is darker.
• Thin skin — the muscle underneath shows through with a bluish tone.

So when someone says, "I have dark circles, so I want under-eye filler," sometimes that works and sometimes it doesn't. For under-eye filler to make sense, there has to be an actual hollow.

Can under-eye filler replace surgery for eye bags?

Not completely, but it can make bags look much less obvious by reducing the step between the bulge and the hollow. Under-eye filler suits people who don't want surgery, or who want a short procedure and a quick recovery. If there is a lot of bulging fat, surgery such as fat repositioning is ultimately the right answer. But even then, filling the hollow part reduces the gap between what sticks out and what sinks in. Some patients tell me it looks 70–80% better to them. For people who are nervous about surgery, or want to postpone it, under-eye filler is a reasonable option.

If you are weighing the surgical route, under-eye fat repositioning: cost, reviews and recovery explains it, and our video on treating under-eye bags without surgery looks at the same question from another angle.

When is fat grafting better than filler for dark circles?

When the skin is very thin and the darkness shows through it. Some patients who come in asking for under-eye filler leave with my recommendation to consider fat grafting instead. The reason is simple: filler is very transparent. It can fill a hollow so it no longer looks sunken, but it cannot solve the see-through look. If I can predict the dark tone will still show after treatment, filler is not the right tool.

Fat is yellowish. When fat taken from the thigh or abdomen is injected under the skin, putting something yellow there is different from putting something clear. Fat also develops new blood vessels, so the color of the area can look healthier. That is why, for these patients, I recommend fat grafting. It is a larger procedure than filler, and whether it suits you is a decision made in consultation.

Skin quality is another separate issue. Treatments such as Rejuran work on the skin itself rather than adding volume — Rejuran under-eye before and after shows what that kind of change looks like.

What is HERA's eye-fill approach?

Eye filler is a specialized category at HERA: the injector's skill and the choice of filler matter equally. There are many kinds of filler. We don't insist on a single product for the eye area. Instead we think about how to combine fillers to get the right softness and the right longevity for this thin, mobile skin. Over a long period of experience we have found the softness and type of filler that work best here, and we use the minimum amount needed.

Who is under-eye filler for?

Age matters less than cause. Patients range from their 20s and 30s to their 50s and beyond. Fat naturally decreases with age, so hollows become more obvious and older patients do come more often. But many younger patients also dislike the two or three lines a sunken under-eye creates.

For international patients at HERA, the plan looks like this:

1. Cause first. Hollow, bulge, pigment or thin skin — often a mix.
2. An itemized written estimate naming the product and amount. International patients pay the same as local patients, and an English interpreter is with you.
3. Treatment with topical numbing and a fine blunt cannula, usually within about 30 minutes.
4. Recovery. The under-eye skin is thin, so mild swelling or a small bruise for a few days is possible; it can usually be covered with concealer and settles within about a week.

For cost factors, see what drives under-eye filler prices in Korea.

The honest limits

Eye filler is not ordinary filler, and results depend heavily on delicate technique. Filler cannot change pigment, cannot hide see-through skin and cannot remove large fat bags. Placed too superficially or in too large an amount, it can look puffy or bluish. That is why I strongly recommend choosing an injector with a lot of experience in this area. Results vary between people, and the right plan is confirmed only after an in-person assessment. You can see real HERA results in our before-and-after gallery.