The most common side effects of hyaluronic acid filler are swelling, bruising, tenderness and redness at injection sites, which usually settle within a few days to two weeks. Less common effects include lumps or asymmetry. Rare but serious risks include vascular occlusion and infection. At Re:berry Hongdae, a doctor performs and monitors filler treatments.
Re:berry Clinic Hongdae · Information reviewed for accuracy · Results vary by individual.
What are the common side effects?
Most people experience some temporary effects after Juvederm, Restylane or other hyaluronic acid fillers:
- Swelling: peaks in the first 24–48 hours and usually settles within a week; lips and under-eyes may take longer.
- Bruising: small bruises can last five to ten days.
- Tenderness and redness: typically mild and short-lived.
- Firmness: the area may feel slightly firm while the filler integrates.
See how long swelling lasts after filler for a timeline.
What are less common side effects?
- small lumps or nodules, which may be massaged or treated if they persist;
- asymmetry, often improving as swelling settles;
- a bluish tint when filler sits too superficially in thin skin;
- delayed swelling weeks later, sometimes linked to illness or dental work.
What are the rare but serious risks?
Vascular occlusion happens when filler blocks or compresses a blood vessel. It is rare but needs urgent treatment. Warning signs include severe pain, skin turning white, gray or mottled purple, and, very rarely, changes in vision. Hyaluronic acid filler can be dissolved with hyaluronidase, which is one reason doctors prefer it. Other rare risks include infection and allergic reaction.
Do side effects differ by area?
Yes. Lips tend to swell and bruise more because they are very vascular. Under-eye filler sits under thin skin, so lumps or a bluish tint are more likely if placement is too shallow, and swelling may linger. Areas such as the nose and glabella carry a higher risk of vascular complications, which is why doctors use careful technique there. Cheek, chin and jawline filler usually cause milder, shorter swelling.
How are risks reduced?
- a doctor-led consultation reviewing medical history and anatomy;
- choosing the right product, depth and technique for each area;
- using genuine products and sterile technique;
- clear aftercare instructions and a way to contact the clinic.
Avoid alcohol, saunas and intense exercise for 24–48 hours, and do not massage unless instructed. Read filler aftercare for detail. Results vary by individual.
At a glance
- Common: Swelling, bruising, tenderness, redness
- Usually settles: Within a few days to 2 weeks
- Less common: Lumps, asymmetry, bluish tint under thin skin
- Rare but serious: Vascular occlusion, infection, allergic reaction
- Reversible: HA filler can usually be dissolved with hyaluronidase
Related questions
Can filler side effects be reversed?
Many can. Hyaluronic acid filler can usually be dissolved with an enzyme called hyaluronidase if there are lumps, overcorrection or an urgent complication such as vascular occlusion. Swelling and bruising resolve on their own. The doctor will advise on the safest option if something does not settle as expected.
Who should avoid filler?
Filler is generally postponed during pregnancy and breastfeeding, with an active skin infection or cold sore in the area, or shortly before major dental work. People with certain autoimmune conditions, bleeding disorders or a history of severe allergies should discuss them with the doctor. Always share your full medical history.
Is it safe to fly after filler?
Most people can fly a day or two after filler, although swelling may feel more noticeable in the cabin. If possible, allow time for a quick check before leaving Seoul, particularly after lip or under-eye filler, and know how to contact the clinic if you have concerns after returning home.
Keep reading
Before you book
This page is general information, not a diagnosis. Suitability, dose, number of sessions and expected results are decided by a doctor at consultation, and results vary by individual. Possible side effects include redness, swelling and bruising. Pricing is confirmed in writing before any treatment. See our medical disclaimer.
Still have a question?
A doctor at Re:berry Clinic Hongdae can answer it for your skin specifically. Multilingual consultation support is available.