09/09/2025
[Skin Library] What is Hyaluronic acid (HA)
Hyaluronic acid (HA) is a natural substance that can rejuvenate the skin and enhance the volume of subcutaneous tissues when injected into the dermal layer of skin.
HA injections typically last 6 to 12 months. Results may vary based on the product and individual metabolism. Maintenance treatments may be necessary for sustained effects.
Factors Affecting outcomes
1. Doctors experience and technique
2. Skin condition
3. Immune response
4. Metabolic rate
Side Effects and Precautions
1. Redness
2. Itch
3. Discomfort
4. Bruise (temporary)
Injection can obstruct blood supply, causing tissue necrosis and permanent scarring. It can also lead to vascular embolism, resulting in blindness and stroke.
Within 48 hours post-injection, apply cold compresses moderately to the injection site; avoid alcohol, strenuous exercise, and spicy foods.
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