In short. Vascular occlusion is a blocked blood vessel after an injectable filler, and the tissue that vessel supplies is starved of blood. Severe pain out of proportion to the injection, skin turning white, grey, mottled or dusky, and any change in vision all mean the same thing: contact the treating team now and act immediately rather than waiting for certainty.
Key points
- Pain out of proportion to the injection is the earliest and most reliable sign.
- Colour change (white, grey, mottled, dusky, lacy) follows or accompanies it.
- Signs appear during the injection or in the hours afterwards.
- Suspicion is enough; the tissue does not recover while everyone waits.
- Vision change is an emergency in its own right.
What does a vascular occlusion look like?
The earliest and most reliable sign is pain. Not the ordinary tenderness of an injection, but pain that is severe and out of proportion to the amount of work done, and pain that keeps worsening rather than settling. Alongside it, or shortly after, the skin over the treated area changes colour. It may go white, grey, mottled or dusky, and it sometimes takes on a lacy, net-like pattern. The skin may feel cool, and capillary refill may be altered.
These signs may appear during the injection or in the hours afterwards. They are not subtle once established. The difficulty is that in the first minutes they can be attributed to bruising, or to the fact that injections hurt.
| Sign | When it may appear | What it means | What to do |
|---|---|---|---|
| Severe pain, out of proportion to the injection, worsening | During the injection or hours after | Earliest and most reliable sign | Contact the treating team now |
| Skin white, grey, mottled or dusky | With the pain or shortly after | Colour change over the treated area | Contact the treating team now |
| Lacy, net-like pattern on the skin | With the colour change | The same process, a more obvious pattern | Contact the treating team now |
| Skin cool, capillary refill altered | With the colour change | Circulation in the treated area is affected | Report it alongside the other signs |
| Any change in vision | At any point after a facial injection | An emergency in its own right | Emergency care immediately, without waiting |
Suspicion is enough to act on. There is no cost to being seen and told that nothing is wrong, and a substantial cost to being seen late.
Why the first hour matters
The tissue downstream of the blockage is deprived of blood. Some of it can be salvaged if the blood supply is restored quickly; less of it can be salvaged later. That is the whole reason this is treated as an emergency rather than as a complication to be assessed at a convenient time. It is also why it is managed where it can be acted on immediately.
What should you do the moment you suspect it?
Stop and make contact. Contact your treating team now and say that you have severe pain out of proportion to the injection, or a change in the colour of the skin over the treated area. If the team cannot be reached, call the hospital main line, and if the finding is clear, go to the nearest emergency department immediately rather than waiting for a reply. If there is any change in vision, treat it as an emergency in its own right and go now.
What not to do while waiting
Do not massage or press the area, do not apply heat or ice, and do not attempt to treat it yourself. Waiting to see whether the picture becomes clearer is the one thing the tissue cannot afford, because it does not recover on its own and treatment is more effective the earlier it is given.
What the treating team needs to know
Say what you were injected with and when, because the substance class determines what can be done. If you do not know, say that as well.
Which signs mean emergency care now?
- Severe pain out of proportion to the injection, or pain that keeps worsening.
- Skin over a treated area turning white, grey, mottled or dusky — contact the treating team now, and if the team cannot be reached go to the nearest emergency department immediately.
- Any change in vision — seek emergency care immediately and without waiting.
Sources
- MHRA — information on dermal filler safety and reporting
- NICE — guidance on cosmetic procedures
- British Association of Plastic, Reconstructive and Aesthetic Surgeons — dermal filler complication guidance
Internal links
Frequently asked questions
What does a vascular occlusion look like?
The earliest sign is usually pain that is severe and out of proportion to the injection. Then the skin over the treated area changes colour: white, grey, mottled or dusky, sometimes in a lacy pattern. Neither sign is subtle once established, and both are easy to dismiss in the first minutes.
How quickly does it need to be treated?
Immediately. The tissue supplied by the blocked vessel is being starved of blood, and it does not recover on its own. A vascular complication recognised in the first hour is usually a different problem from the same complication recognised on the third day, which is why this is not a wait-and-see situation.
Can a vascular occlusion cause blindness?
It can. Where the material reaches the blood supply of the eye, vision can be affected, and this is rare but it is the reason any change in vision after a facial injection is an emergency requiring immediate care rather than an appointment.
Risks & Limitations
- Vascular occlusion — filler blocking a blood vessel. This is a time-critical emergency that can cause skin loss and, rarely, vision loss.
- Skin injury, blistering or a dusky patch over a treated area.
- Nodules, lumps or delayed inflammatory reactions, which may need treatment or dissolving.
- Infection at an injection site, including a deep collection that needs drainage.
- Filler that has migrated away from the intended area.
- Asymmetry or over-correction, which is harder to correct than under-correction.
- An unknown product, which changes what can be done and how quickly.
When to Seek Care
- Severe pain out of proportion to the injection, or skin turning white, grey, mottled or dusky — a vascular emergency; contact your treating team now, and if the team cannot be reached go to the nearest emergency department immediately.
- Any change in vision — seek emergency care immediately.
- Fever, spreading redness, warmth or pus at an injection site.
- A hard, painful lump that is growing, or redness and swelling appearing weeks to months after treatment.
- Skin breakdown or blistering over a treated area.
References & Further Reading
- American Academy of Dermatology (AAD) — injectable safety information
- American Society of Plastic Surgeons (ASPS) — dermal filler guidance
- U.S. Food and Drug Administration (FDA) — approved dermal filler products
- National Medical Products Administration (NMPA, China) — approved product status
- Chongqing West District Hospital — Plastic Surgery & Aesthetics Medical Center
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.