In short. Vascular occlusion is the loss of blood supply to tissue after an injectable filler or fat graft enters or presses on an artery. Skin, and in the worst case the retina, can be irreversibly damaged within hours, so stop treatment at once and telephone the treating clinic or attend an emergency department immediately.
Key points
- Vascular occlusion is uncommon but time-critical; skin, and rarely the retina, can be damaged within hours.
- The earliest sign is pain out of proportion to a straightforward injection.
- Skin turns pale, then grey, mottled or dusky, feels cool, and capillary refill slows.
- Stop treatment, call the treating clinic, and attend an emergency department if it cannot be reached.
- Do not massage, apply heat, or take anything by mouth on your own initiative.
Why do minutes matter?
An injectable filler or a fat graft is placed into tissue supplied by a network of small arteries. If material enters an artery and travels against the flow, or if it compresses a vessel, the tissue downstream loses its blood supply. That is vascular occlusion. It is uncommon, and it is the emergency in aesthetic medicine where the clock matters most: skin, and in the worst case the retina of the eye, can be irreversibly damaged within hours.
Skin can survive a period without perfusion; it cannot survive indefinitely. The window in which tissue can be saved is measured in a small number of hours, and the window for the eye is narrower still. Treatment started early can restore flow or limit the territory of damage. Treatment started the next day usually cannot undo what has already happened. This is the single most important reason not to wait for a scheduled review.
What are the warning signs?
The earliest sign is pain, often severe and out of proportion to a straightforward injection. Then the skin changes. It may turn pale or white, then grey, mottled or dusky blue, and it may feel cool compared with the surrounding skin. A sharp border between normal and abnormal skin is characteristic. Capillary refill may be slow or absent. If the injection was near the eye or the nose, vision may blur, a shadow or curtain may appear in the field of view, or the eye may ache.
| Finding | What occlusion looks like | What settles on its own |
|---|---|---|
| Pain | Severe, out of proportion to a straightforward injection | Soreness at the injection site |
| Colour | Pale or white, then grey, mottled or dusky blue | Bruising; transient blanching after the needle |
| Border | Sharp line between normal and abnormal skin | No sharp edge |
| Temperature | Cool compared with the surrounding skin | Warm and settling |
| Capillary refill | Slow or absent | — |
| Vision, near the eye or nose | Blurring, a shadow or curtain in the field of view, eye ache | — |
Any of these findings, and especially pain with a colour change in skin that feels cool, is a reason to telephone at once.
How is occlusion told apart from ordinary bruising?
Bruising, and the transient blanching that follows an injection, are common and settle. Occlusion is different in character: the colour change persists, the pain is disproportionate, and the area feels cool. When you cannot tell the two apart, that uncertainty is itself a reason to telephone immediately rather than to wait.
What to do while help is arranged
- Stop any further treatment.
- Contact your treating clinic at once and state clearly that you have had an injectable and are concerned about vascular occlusion.
- If the clinic cannot be reached, call the hospital main line or attend the nearest emergency department without delay.
- Tell them the area treated, what was injected and when.
- Keep the area visible so that it can be examined.
If your vision is changing, treat it as the highest urgency and say so the moment you arrive.
What must not be done?
Do not massage the area, apply heat, or take anything by mouth on your own initiative. Do not wait for a scheduled review in the hope that the colour will settle.
Is this a reason to fear treatment?
Occlusion is rare, and most injectable treatments pass without incident. Knowing these signs is not a reason to be frightened of treatment; it is a way of removing hesitation from the one situation in injectable practice where hesitation is decisive.
Sources
Internal links
Frequently asked questions
What are the first warning signs of vascular occlusion?
Pain is usually the earliest sign, often severe and out of proportion to a straightforward injection. The skin then changes: pale or white, then grey, mottled or dusky blue, and cool compared with the surrounding skin. A sharp border between normal and abnormal skin is characteristic, and capillary refill may be slow or absent.
Why can I not wait until my next scheduled appointment?
Because the window in which tissue can be saved is measured in hours, not days. Treatment started early can restore flow or limit the territory of damage; treatment started the next day usually cannot undo what has already happened. If the injection was near the eye, that window is narrower still.
What should I do while I am trying to reach the clinic?
Stop any further treatment and telephone your treating clinic at once. If you cannot reach it, call the hospital main line or attend the nearest emergency department without delay. Do not massage the area, apply heat, or take anything by mouth on your own initiative, and keep the area visible so it can be examined.
Risks & Limitations
- Most recoveries are uneventful, but a minority of complications are time-critical and are measured in hours rather than days.
- Delay is the main factor that turns a treatable problem into a permanent one, which is why this guide asks you to make contact early rather than to wait and see.
- This guide cannot replace an in-person assessment. It describes general warning signs, not your own case, and it cannot tell you what is happening in your tissue.
- Your own treating team's aftercare instructions take precedence over anything written here. If they differ from this guide, follow your team.
- Some complications described here are rare. Reading about them is not a reason to expect them, and it is not a substitute for asking your team what specifically to watch for.
When to Seek Care
- Difficulty breathing, chest pain, or a swollen and painful calf — call emergency services or attend the nearest emergency department immediately.
- Sudden change or loss of vision — attend the nearest emergency department immediately, and say what procedure you had.
- Severe pain out of proportion to the procedure, or skin turning white, grey, mottled or dusky after an injectable.
- Uncontrolled bleeding, or a flap or graft turning dark or cold.
- Fever, spreading redness, pus or foul-smelling discharge from a wound, or a wound that is opening — contact your treating team the same day, or the hospital main line if the team cannot be reached.
References & Further Reading
- World Health Organization (WHO) — patient safety and emergency care resources
- National Institute for Health and Care Excellence (NICE, UK) — relevant clinical guidance
- American Society of Plastic Surgeons (ASPS) — procedure and safety guidance
- Resuscitation Council — basic life support and emergency response guidance
This page is patient education, not medical advice, and it does not cite individual studies. It cannot diagnose your situation and it does not replace an examination. In an emergency, call emergency services or attend the nearest emergency department. To contact the team at Chongqing West District Hospital, see Contact & Emergency Guidance.