Guide · Filler problems
Tyndall effect after filler: why it looks blue, where it happens, and how it is corrected
A blue or grey tinge over filler is not a bruise and not a dark circle. It is light scattering off hyaluronic acid placed too close to the surface. Here is how it is recognised, and why it is one of the more straightforward filler problems to correct.
Prepared by the SkinRev Lab team · Updated 9 Nov 2026
Quick answer
- The Tyndall effect after filler is a blue or grey tinge over hyaluronic acid placed too superficially. Blue light scatters more than red light in the clear gel, so the area looks bluish through thin skin.
- It is most common under the eyes, along the lip border and in fine lines treated with too superficial a filler. It does not fade much with time, because HA can persist for years.
- It is usually corrected with small, targeted doses of hyaluronidase, ideally after ultrasound shows where the superficial filler sits.
- Assessment and correction are performed by Dr Sin Yong at SkinRev Lab, CityLink Mall, and IN Eternity Clinic, Pacific Plaza, priced at consultation.
General information only, not medical advice. Your own suitability is assessed at consultation.
Definition
What the Tyndall effect is
The Tyndall effect is a physics term for light scattering in a clear medium. Hyaluronic acid filler is a clear gel; when a small amount sits just under thin skin, it scatters the shorter blue wavelengths of light back to the eye more than the red ones, so the area looks blue or blue-grey. It is a sign of filler placed too close to the surface, not of damage to the skin.
It usually appears once the early swelling settles and does not go away the way a bruise does. It is one of the reasons the under-eye is treated with small amounts, deep, by an experienced doctor.
Where
Where the Tyndall effect happens
- Under the eyes: the thinnest skin of the face; the most common site, especially with tear trough filler placed too high.
- The lip border: filler that has spread or been placed just under the skin of the upper lip.
- Fine lines: crow's feet, forehead and smile lines treated with filler too superficially.
- Over migrated filler: gel that has moved into a thinner area, such as the eyelid.
Tell it apart
Tyndall effect, bruise, dark circle or an emergency?
| What it is | How it looks | What to do |
|---|---|---|
| Tyndall effect | Blue-grey over a soft swelling; same colour for weeks | Book an assessment; usually dissolved |
| Bruise | Purple, then green-yellow; fades over one to two weeks | Wait; it settles |
| Vascular dark circle | Blue-purple that was there before filler | Not caused by filler; other treatments |
| Blocked blood vessel | Pale, dusky or mottled skin, rising pain, within hours | Emergency: contact a doctor now; 995 for vision change |
Hirsch RJ, Narurkar V, Carruthers J. Management of injected hyaluronic acid induced Tyndall effects. Lasers Surg Med. 2006;38(3):202-204. Funt D, Pavicic T. Dermal fillers in aesthetics: an overview of adverse events and treatment approaches. Clin Cosmet Investig Dermatol. 2013;6:295-316.
Treatment
How the Tyndall effect is corrected
Because the cause is hyaluronic acid in the wrong layer, the usual correction is a small, targeted dose of hyaluronidase into the superficial filler. Ultrasound helps show exactly where it sits, so deeper filler that is doing its job can often be left. Change is usually seen within a day or two, once injection swelling settles; a second small session is sometimes needed.
Massage does not move superficial filler away reliably, and waiting rarely helps, because HA can persist for years. Non-HA fillers do not usually cause a blue tinge, but they cannot be dissolved, so the product history matters.
More: tear trough filler gone wrong, dissolving filler and ultrasound-guided filler dissolving.
Prevention
Reducing the risk
- Small amounts, placed deep, in thin-skinned areas.
- Softer gels suited to the area; not every filler belongs under the eyes.
- Checking for old filler before adding more, since layers build up.
- A doctor who can dissolve HA if it happens.
At SkinRev Lab
Assessment at SkinRev Lab
Dr Sin Yong examines the area, asks about each filler and date, and uses ultrasound where useful before dissolving. Correction is priced at consultation. SkinRev Lab, #B1-28 CityLink Mall, 1 Raffles Link (City Hall and Esplanade MRT), open daily 11am to 8pm, WhatsApp +65 8266 9585; or IN Eternity Clinic, Pacific Plaza, Orchard. For every kind of filler problem, see filler correction Singapore.
Evidence
References & sources
- Hirsch RJ, Narurkar V, Carruthers J. Management of injected hyaluronic acid induced Tyndall effects. Lasers Surg Med. 2006;38(3):202-204.
- 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.
- Funt D, Pavicic T. Dermal fillers in aesthetics: an overview of adverse events and treatment approaches. Clin Cosmet Investig Dermatol. 2013;6:295-316.
- Murray G, Convery C, Walker L, Davies E. Guideline for the safe use of hyaluronidase in aesthetic medicine, including modified high-dose protocol. J Clin Aesthet Dermatol. 2021;14(8):E69-E75.
- Schelke LW, Decates TS, Velthuis PJ. Ultrasound to improve the safety of hyaluronic acid filler treatments. J Cosmet Dermatol. 2018;17(6):1019-1024.
Common questions
Your questions,
answered
What does the Tyndall effect look like?
A blue or blue-grey tinge over a soft area of filler, most often under the eyes or along the lip border. Unlike a bruise, the colour does not change or fade over a week or two.
Does the Tyndall effect go away on its own?
Rarely, and slowly. Hyaluronic acid can persist for years, so a blue tinge usually stays unless the superficial filler is dissolved.
How is the Tyndall effect treated?
With small, targeted doses of hyaluronidase into the superficial filler, ideally after ultrasound mapping. Most people see the change within one to three days.
Can the Tyndall effect happen in the lips?
Yes, usually along the border or above the lip line where filler sits just under the skin, sometimes after it has migrated.
Is the Tyndall effect dangerous?
No. It is a cosmetic problem. Skin that turns pale, dusky or mottled with rising pain after filler is different and is an emergency.
Can the Tyndall effect come back after dissolving?
Not from the filler that was dissolved. It can happen again if new filler is placed too superficially, which is why any later treatment is planned carefully.