Tyndall Effect After Filler: Why the Under-Eye Looks Blue
Medical Director Dr Sin Yong explains why hyaluronic acid filler can look blue under thin skin, how to tell it from a bruise or dark circles, and how it is corrected.
WhatsApp to Enquire →Key facts ↓The Tyndall effect is a bluish tint that appears when hyaluronic acid filler sits too close to the surface, most often under the eyes, because the clear gel scatters blue light back through thin skin. It rarely fades quickly on its own, since the filler can persist for years. It can usually be corrected by dissolving the superficial product with hyaluronidase, ideally guided by ultrasound.
- Cause: a review of the problem attributes the discolouration to filler injected "too superficially", producing the Tyndall effect [1].
- A recognised late reaction: an international consensus lists skin discolouration with nodules and granulomas among the late reactions to hyaluronic acid filler [2].
- Under-eye problems can be late: in a review of 52 delayed complications after tear trough filler, the average onset was 16.8 months, and swelling and lumps were the commonest [3].
- It does not leave quickly: MRI of 33 people found hyaluronic acid still present in all of them at least two years after injection [4].
- Correctable: hyaluronidase can correct excess hyaluronic acid, and ultrasound can guide it into the deposit itself [6,5].
What is the Tyndall effect after filler?
The Tyndall effect after filler is a blue or blue-grey tint over an area treated with hyaluronic acid, caused by gel lying too close to the surface. It is most common under the eyes.
The name comes from physics: very small particles in a clear medium scatter short, blue wavelengths of light more than longer, red ones, which is also why a light beam through fine mist can look blue. Hyaluronic acid filler is a clear gel. Placed deep, under muscle and close to bone, it is hidden. Placed superficially, under skin as thin as the lower eyelid, it scatters light back through the skin and looks bluish, especially in daylight and in photographs [1].
It is a placement problem rather than an allergy, an infection or a bruise, and it is not dangerous. But it is a visible one, and it is one of the commonest reasons people seek filler correction under the eyes. For the full range of filler problems, early and late, see the filler complications overview.
Why does filler look blue under the eyes?
Filler looks blue under the eyes because the lower eyelid skin is among the thinnest on the face, so any gel placed superficially there scatters light and shows through.
- Thin skin. The skin of the lower lid and tear trough is very thin and has little fat beneath it, so it hides very little.
- Superficial placement. Product placed above the orbicularis muscle, or into the skin itself, is the usual cause [1].
- Too much product. A larger volume makes a superficial deposit more visible and can also show as a ridge.
- Product type. Firm, highly cross-linked gels hold more water and can look more obvious in this area than soft gels intended for it.
- Spread over time. Product placed correctly can spread upwards into the lid if large amounts are used; see filler migration.
Lighting matters too. The tint is often most visible in daylight, under overhead lights and in phone photographs, and may be hard to see in a dim room. That is one reason the face is examined and photographed in standard light at assessment.
Tyndall effect, bruise or dark circles: how do you tell?
A Tyndall tint is a steady blue-grey that does not change over days; a bruise turns purple, green and yellow and fades; dark circles predate the filler.
| Feature | Tyndall effect | Bruise | Dark circles (pigment or veins) |
|---|---|---|---|
| When it appears | Once swelling settles, days to weeks after filler; sometimes later | Within hours of injection | Before any filler |
| Colour over time | Stays the same blue-grey | Purple, then green and yellow, then gone | Brown (pigment) or blue-purple (veins), long-standing |
| Feel | Often a soft, slightly raised fullness | Tender, sometimes a small knot | Flat |
| How long | Months to years if untreated | One to two weeks | Long-standing |
| What helps | Dissolving the superficial product | Time, cold compresses early, sun protection | Depends on cause; see dark circles assessment |
Dark circles have several causes, from pigment to visible veins to the shadow of a hollow, and filler helps only the last. How hollows are assessed is on under-eye hollows, and the normal day-by-day course after treatment is in tear trough filler recovery.
How soon does the Tyndall effect appear, and does it go away?
It usually shows once early swelling settles, within days to weeks, and rarely fades quickly, because hyaluronic acid under the eyes can last for years.
In the first days the area is swollen and may be bruised, which can hide or mimic a tint. Once that settles, a superficial deposit becomes visible. Some people only notice it months later, when a photograph in daylight catches it, or after more filler has been added over it. Delayed problems under the eyes can appear well over a year after treatment: in a review of 52 delayed tear trough complications, the average onset was 16.8 months [3].
Waiting is rarely a cure. Hyaluronic acid was still detectable on MRI in all 33 people studied at least two years after injection, and in one person after 15 years [4]. Under the eye, where there is little movement, product can persist longer than it does in the lips.
When to seek urgent help
A blue tint on its own is not an emergency. These signs are different, particularly close to the eye: they can mean that filler is blocking a blood vessel, and they need action the same hour.
- Skin that turns pale or white (blanching) during or soon after the injection
- Severe pain, or pain that keeps increasing, rather than settling
- Mottled, dusky, blue-grey or purple patches, often in a net-like or branching pattern
- Any change in vision: blurring, a shadow, double vision, loss of part of the visual field, or eye pain
What to do: contact the clinic that treated you immediately, by phone or WhatsApp, and say that you have had filler and what you are seeing; a photograph helps. For any change in vision, go to the nearest emergency department straight away (in Singapore, call 995 if you cannot get there safely). Do not wait to see whether it settles, and do not try to treat it yourself at home.
IN Eternity Clinic patients: WhatsApp or call +65 8815 3008. If you were treated elsewhere, contact that clinic first, because they know which product was used and where; if you cannot reach them, seek medical care without delay.
“Under the eye, the question is never only how much filler, but how close to the surface. A small amount in the wrong layer shows more than a larger amount in the right one.”
How is the Tyndall effect corrected?
The Tyndall effect is usually corrected by dissolving the superficial hyaluronic acid with hyaluronidase, in small amounts, after an ultrasound scan has shown where the product sits.
Hyaluronidase breaks down hyaluronic acid and can correct excess or misplaced filler [6]. Ultrasound shows the depth and size of the deposit and allows the enzyme to be placed into it [5]. At IN Eternity Clinic the doses under the eye are small, because the skin is thin; swelling can take a little longer to settle than elsewhere, and the area is reviewed at about two weeks before any further dose.
- Step 1: assessment. Examination in standard light, photographs, and an ultrasound scan to locate the product and check for older filler.
- Step 2: dissolving. The enzyme is placed into the superficial deposit. Allergy history, including bee or wasp sting allergy, is checked first.
- Step 3: review. At about two weeks, once swelling has settled, the result is judged; a small further dose is given only if product remains.
- Step 4: decide on refilling. If a hollow remains, a small amount of soft filler can be placed deep later, or a non-filler option considered.
A review of the problem also discusses other management options [1]; dissolving remains the most direct, because it removes the cause. Correction of the under-eye area overall is covered on filler correction.
Can the Tyndall effect happen outside the under-eyes?
Yes, though less often: any area where hyaluronic acid sits superficially under thin skin can look bluish, including fine lines, the lips and the folds beside the nose.
It is seen where product has been placed very superficially to treat fine lines, along the lip border when product has spread into the skin above it, and occasionally in the nasolabial folds. In thicker skin, such as the cheeks and chin, the same product placed at the same depth is usually hidden. Lip-specific issues are covered in lip filler side effects.
How is the Tyndall effect prevented?
It is prevented by placing small amounts of soft hyaluronic acid deep, close to bone and beneath the muscle, usually with a fine cannula, and by choosing candidates carefully.
At IN Eternity Clinic, under-eye filler uses soft hyaluronic acid only, usually placed with a fine cannula, in small amounts, deep, and reviewed after two to four weeks; it is injected by a doctor. Earlier under-eye filler is checked, sometimes with ultrasound, before more is added, because layering is a common route to both a blue tint and puffiness.
Candidate selection matters as much as technique. People with very thin, translucent lower-lid skin, prominent eye bags or puffiness that comes and goes may be better served by something other than filler; a polynucleotide booster such as Rejuran is one alternative discussed for skin quality around the eyes. Most filler complications relate to volume and technique [7], and under the eye the margin for error is small.
What Dr Sin Yong looks for
- The colour of the area in daylight-equivalent light, and whether the tint sits over a soft fullness, which points to product rather than pigment or veins.
- The depth of any hyaluronic acid on ultrasound, and whether older filler is present above or below it.
- Skin thickness and how translucent the lower lid is, which decides whether filler is wise at all.
- Puffiness that changes through the day or with salt, sleep or allergy, which filler can make worse.
- Whether a remaining hollow, once the tint is corrected, is better left, treated with a small deep amount later, or managed another way.
General clinical observations used at consultation; they describe what is checked, not any individual result.
What should you ask before under-eye filler?
Ask which product will be used, at what depth, with a needle or a cannula, how much, and what the plan is if a tint or puffiness appears.
- Is the product a soft hyaluronic acid intended for the tear trough, and is it registered with the Health Sciences Authority?
- Will it be placed deep, under the muscle, and with a cannula where suitable?
- Will any earlier filler be checked first, and how?
- Is hyaluronidase kept on site, and who will review you at two to four weeks?
- Close to the eye, what is the plan for the rare vascular emergency? About four in five recent published cases of filler-related vision loss involved hyaluronic acid [8], which is why readiness matters here.
Good answers to these questions are specific, not reassuring generalities. For how under-eye treatment is planned overall, see under eye filler in Singapore.
Frequently asked questions
Does the Tyndall effect go away on its own?
Rarely, and not quickly. The tint comes from hyaluronic acid sitting too close to the surface, and under the eyes that product can last for years; in one MRI study, filler was still present in every person at least two years later. Dissolving the superficial product is usually the most direct correction.
How do I know if my under-eye filler has the Tyndall effect?
Look in daylight for a steady blue or blue-grey tint over a soft fullness that has not changed colour for weeks. A bruise changes colour and fades within about two weeks, and dark circles were there before filler. An examination with an ultrasound scan confirms whether superficial product is the cause.
Can the Tyndall effect be fixed without dissolving?
Dissolving with hyaluronidase is usually the most direct fix, because it removes the cause. Other management options have been described, and make-up can disguise a mild tint, but leaving superficial product in place usually leaves the tint. The choice is made at assessment.
Is the Tyndall effect dangerous?
No. It is a cosmetic problem caused by product depth, not an infection or allergy. It should not be confused with the warning signs of a blocked vessel, which are pale or dusky skin, severe or increasing pain, or any change in vision, and which need urgent care.
How long after dissolving will the blue tint go?
Much of the change is usually visible within one to two days, once swelling from the injection settles, although under the eye swelling can take a little longer. The result is judged at about two weeks, and a further small dose is given only if product remains.
Can I have under-eye filler again after the Tyndall effect?
Sometimes. Once the superficial product has been dissolved and the area has settled, a small amount of soft hyaluronic acid can be placed deep if a hollow remains. Some people decide that a non-filler approach suits them better. The decision is made after the two-week review.
Does the Tyndall effect happen with all fillers?
It is mainly a hyaluronic acid problem, because the clear gel scatters light when superficial. Other products can cause visible ridges or lumps if placed too close to the surface, but the typical blue tint is linked to hyaluronic acid.
Who is most at risk of the Tyndall effect?
People with very thin, translucent lower-lid skin, those who have had several rounds of under-eye filler, and anyone treated with product placed superficially or in larger amounts. Careful candidate selection, deep placement of small amounts and checking for old filler lower the risk.
Book an assessment
IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, Singapore 228210. By appointment with Medical Director Dr Sin Yong. Monday to Saturday, 11am to 8pm. WhatsApp or call +65 8815 3008. At IN Eternity Clinic a consultation fee applies, and it is waived if you go ahead with any medical treatment; the fee is S$120.
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References
- Hirsch RJ, Narurkar V, Carruthers J. Management of injected hyaluronic acid induced Tyndall effects. Lasers Surg Med 2006;38(3):202-204. doi:10.1002/lsm.20283
- Signorini M, Liew S, Sundaram H, et al. Global Aesthetics Consensus: avoidance and management of complications from hyaluronic acid fillers — evidence- and opinion-based review and consensus recommendations. Plast Reconstr Surg 2016;137(6):961e-971e. doi:10.1097/PRS.0000000000002184
- Trinh LN, McGuigan KC, Gupta A. Delayed complications following dermal filler for tear trough augmentation: a systematic review. Facial Plast Surg 2022;38(3):250-259 (online 2021). doi:10.1055/s-0041-1736390
- Master M, Azizeddin A, Master V. Hyaluronic acid filler longevity in the mid-face: a review of 33 magnetic resonance imaging studies. Plast Reconstr Surg Glob Open 2024;12(7):e5934. doi:10.1097/GOX.0000000000005934
- Schelke LW, Decates TS, Velthuis PJ. Ultrasound to improve the safety of hyaluronic acid filler treatments. J Cosmet Dermatol 2018;17(6):1019-1024. doi:10.1111/jocd.12726
- Cavallini M, Gazzola R, Metalla M, Vaienti L. The role of hyaluronidase in the treatment of complications from hyaluronic acid dermal fillers. Aesthet Surg J 2013;33(8):1167-1174. doi:10.1177/1090820X13511970
- Funt D, Pavicic T. Dermal fillers in aesthetics: an overview of adverse events and treatment approaches. Clin Cosmet Investig Dermatol 2013;6:295-316. doi:10.2147/CCID.S50546
- Beleznay K, Carruthers JDA, Humphrey S, Carruthers A, Jones D. Update on avoiding and treating blindness from fillers: a recent review of the world literature. Aesthet Surg J 2019;39(6):662-674. doi:10.1093/asj/sjz053
These sources describe mechanisms and general evidence. They are not a promise of any individual result; suitability is decided at an in-person assessment.