Dr. Richard Tsai
Hyaluronic acid filler

Refined Filler

Tear troughs, flat midcheeks, sunken cheeks, nasolabial folds, chin, jawline and lips

What it is

Hyaluronic acid occurs naturally in skin. Aesthetic fillers use cross-linked HA that lasts longer, placed in hollows or where support is needed to refine contour; it can be dissolved with hyaluronidase if needed.

Suitable for
  • Hollow tear troughs that look tired
  • Flat midcheeks lacking fullness when smiling
  • Sunken cheeks that look gaunt
  • Deep nasolabial folds that age the face
  • A short chin or undefined jawline
  • Undefined lip shape or thin lips
Not suitable for
  • Pregnancy or breastfeeding
  • Infection at the site
  • Allergy to the ingredients
  • Active autoimmune disease
  • Anticoagulants or bleeding disorders
  • Active cold sores (for lip injections)
What ultrasound does here

Ultrasound maps vessels before injecting and guides placement in real time, lowering the risk of occlusion and migration.

See ultrasound images →
Risks & how they're managed
Any area
Swelling, bruising, mild tenderness Common What we do: Cold compress; settles in about 2–7 days.
Lumps or nodules Uncommon What we do: Massage and monitor; dissolve with hyaluronidase if needed.
InfectionReported incidence: Under 1 in 1,000 Rare but serious What we do: Antibiotics; dissolve the filler if needed.
By treatment area
Tyndall effect (bluish tint) Uncommon What we do: Dissolve with hyaluronidase.
Under-eye puffiness Uncommon What we do: Monitor; dissolve if it persists.
Lumpiness or unevenness Uncommon What we do: Massage or dissolve.
Vascular occlusion, skin necrosisReported incidence: About 1–5 in 10,000 Rare but serious What we do: Immediate hyaluronidase, emergency care and hospital referral.
Vision loss, blindnessReported incidence: About 1 in 100,000 Rare but serious What we do: Immediate hyaluronidase, emergency treatment and urgent ophthalmology referral.
General information only; likelihood and management depend on the individual. Contact the clinic right away if anything feels wrong.
General information only. Treatment, results and recovery vary; please consult a doctor.
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