Skin blanching during injection: causes and warning signs
Quick facts
- Definition
- An area of skin that turns pale or whitish during or right after injection.
- Causes
- Arterial occlusion, local compression by the product, or vasoconstriction from anesthetic with epinephrine.
- Warning sign
- Pallor with disproportionate pain, mottled skin or slow capillary refill, following the course of a vessel.
- Basic test
- Capillary refill: press and release the skin and compare how fast color returns against the neighboring area.
- Relevance in HOF
- It can be the first sign of vascular occlusion and changes management on the spot.
Skin blanching is an area of skin that turns pale or whitish during or right after a dermal filler injection. It means less blood is reaching that skin at that moment. The cause can be benign, such as local compression by the product or the effect of the anesthetic, or it can be the first sign of vascular occlusion. That is why every case of blanching calls for a pause and an assessment.
What causes blanching?
| Cause | How it usually looks | Behavior |
|---|---|---|
| Arterial occlusion | Pallor that follows a vessel's territory, sometimes away from the injection point; disproportionate pain; later, mottled skin (livedo) and a purplish tone | Does not improve with a pause; slow or absent capillary refill |
| Compression by the product | Pallor localized over the deposit, usually when the product is superficial or the volume is high for the space | Tends to improve quickly as the pressure eases |
| Anesthetic vasoconstriction | Uniform pallor where anesthetic with epinephrine was injected, painless | Appears after anesthesia, does not follow a vessel and fades over time |
The anesthetic also clouds the picture in another way: lidocaine reduces pain, which is one of the warning signs of occlusion. That is why visually watching the skin is part of safety, even when the patient is comfortable.
How can you tell them apart in practice?
The most cited tool is the capillary refill test: press the skin for a few seconds, release and watch how long the color takes to return, comparing with a neighboring untreated area. Slow or absent return, pallor that extends away from the injection point and color change over the following minutes point toward occlusion.
This page is not a care protocol. Management is a decision for the qualified professional, in line with the rules of their professional board and the consensus guidelines on vascular complications.
Where is blanching most concerning?
In high vascular risk areas: glabella, nose, nasolabial fold, lips, temples and the area around the eyes. In the nose and glabella, the network of vessels connects with the circulation of the eye, as described in dorsal nasal artery. For the lip, see lip vascular occlusion.
How should it be documented?
Photograph the area as soon as you notice the blanching and at each step of management, with the time. The record helps track progress and documents the care in the patient record. Also tell it apart from the Tyndall effect, which is bluish, appears later and has nothing to do with circulation.
Also called: blanching, skin pallor, skin whitening.
Frequently asked questions
Is white skin after filler normal?
Not always. It may be just product compression or the effect of the anesthetic, but it can also be the first sign of vascular occlusion. The professional should stop the injection and assess right away.
What is the difference between blanching and anesthetic vasoconstriction?
Anesthetic vasoconstriction is usually uniform, across the anesthetized area, painless and without mottled skin. Occlusion usually follows the territory of a vessel, comes with disproportionate pain and slow capillary refill.