Tear trough filler: only one kind of dark circle responds

Most people who come looking for tear trough filler have a kind of dark circle that filler does not treat.

That is the most useful piece of information in this article, and it almost never comes up before the quote. Dark circles are not one condition — they are three, with different causes and different treatments. Injecting hyaluronic acid into a pigmented dark circle improves nothing, and it does so in the highest-risk area of the face.

The three kinds of dark circle

Pigmented

A brownish, uniform colour that does not change when you stretch the skin with a finger. It is excess melanin in the area — genetic, made worse by sun, friction and chronic inflammation.

Filler does not treat it. Nothing injected there lightens pigment. The route is topical depigmenting agents, strict sun protection, and technologies such as lasers specific to pigment.

Vascular

A bluish, purplish or reddish colour. The thin skin of the area lets the vessels underneath show through. It worsens with poor sleep, dehydration, and toward the end of the day.

Filler has a limited role. In some cases, adding volume to the area reduces the transparency and softens the colour. In others, product makes it worse — it can accentuate the bluish tone through an optical phenomenon called the Tyndall effect. The main treatment is vascular: intense pulsed light, laser, and improving skin quality.

Structural

It is not colour, it is shadow. There is a real depression between the lower eyelid and the cheek, and that depression casts a shadow. The test is simple: under direct frontal light it nearly disappears; with light from above it becomes obvious.

This is the only one filler treats well, because the problem is absence of volume — and volume is what filler restores.

How to identify your type

In front of the mirror, in natural light:

• Stretch the skin with a finger. If the colour goes, it is vascular. If it stays, it is pigmented.
• Shine a flashlight at your face straight on. If the dark circle nearly disappears, it is structural (it was shadow).
• Most people have more than one type. What changes the treatment is which one predominates.

This is guidance so you arrive informed — it does not replace an in-person assessment.

Why the under-eye area carries the most risk

Worth being direct: the tear trough is considered one of the most delicate areas of the face for filler, for concrete anatomical reasons.

The skin there is the thinnest on the body. There is little tissue between skin and bone, which makes any error of volume or plane immediately visible. And, above all, the area has significant vasculature — the angular artery and its branches run close by, with connections that reach the circulation of the orbit.

That is why a vascular complication in this area is more serious than in other parts of the face. It is not a reason not to do it. It is a reason to choose someone who works with anatomical judgment, in a setting with proper structure and hyaluronidase on hand.

How it is done

With a low-density, highly integrating product, registered with Anvisa, the Brazilian health regulator, for the indication, placed in a deep plane against the bone — never superficially. A dense filler or a shallow placement in this area produces visible irregularity and the Tyndall effect.

The quantity is small. Often less than one millilitre for both sides. It is one of the areas of the face where less is literally better, and where the difference between correct and excessive is tenths of a millilitre.

A cannula is preferred in most cases, for its vascular safety profile.

How long tear trough filler lasts

Twelve to eighteen months, one of the longest durations in the face. The reason is the same one that makes the area delicate: little movement and deep placement slow the rate of reabsorption.

As with any filler, the result declines gradually rather than ending all at once.

What are the risks of tear trough filler

Common and temporary: swelling — which in this area can last longer than elsewhere — bruising, and tenderness in the first few days.

Specific to the area:

• Tyndall effect — a bluish look when product sits too superficially. Correctable with hyaluronidase.
• Persistent oedema — the area retains fluid easily. Too much product can produce swelling that does not settle and is worse in the morning.
• Palpable or visible irregularity, because of the minimal thickness of the skin.
• Vascular complication — rare, and the most serious, given the proximity of the orbital circulation.

The first three are manageable, including by dissolving the product. The fourth is why the choice of who injects matters more here than in any other area.

When we advise against it

• When the predominant dark circle is pigmented. It will not work, and saying so beforehand saves money on a treatment that does not treat your problem.
• When there is an obvious under-eye fat pad. Filling below a fat pad accentuates the pad. The indication in that case is usually surgical — outside the scope of a dental surgeon, and the case is referred.
• When there is frequent morning puffiness or known fluid retention. The area will retain more after product, and the result tends to disappoint.
• When the midface has not been assessed. Structural dark circles are often a consequence of lost cheek volume. Treating the cheek sometimes resolves the shadow without touching the eyelid — the same logic as with nasolabial folds.
• When the expectation is to eliminate the dark circle. In mixed cases, filler resolves the structural part and the colour is still there. Promising otherwise is dishonest.
• When the request is to "add it on" to a session for another procedure. This area deserves its own decision.

Frequently asked questions

How much does tear trough filler cost?

It depends on the quantity and the product, and the quantity here is usually small. A quote is only reliable after the assessment that establishes the type of dark circle — because if the type is pigmented, the correct quote is for a different treatment.

Does tear trough filler hurt?

Moderate discomfort. The area is sensitive, but the quantity is small and the procedure is quick. Topical anaesthetic is usually enough, and fillers generally contain lidocaine.

Can pregnant women have tear trough filler?

The standard approach is to postpone. There are no studies establishing the safety of fillers in pregnancy and breastfeeding.

Is under-eye filler the same as tear trough filler?

Yes, it is the same procedure. "Tear trough" is the anatomical name for the depression that creates the shadow.

Can it be undone?

Yes, with hyaluronidase — and this is one of the areas where that reversibility matters most, given the narrow margin between adequate and excessive.