Mechanism
Hyaluronic acid is a water-retaining molecule naturally found in the skin. In its cross-linked gel form, it can remain in the tissue for several months, occupying space and attracting water to compensate for deficiencies. The hardness (G prime) varies: firm gel is used for the chin, cheekbones, and jawline; soft gel for the lips, tear troughs, and superficial wrinkles; and thin gel (skin booster) is solely for hydration without contouring.
Common Areas and Goals
Chin and jawline (to create an angled profile), cheekbones and mid-cheeks (for support and to reduce smile lines), temples (hollows), tear troughs (dark circles under the eyes), lips (contour and moderate volume), frown lines and deep static wrinkles (very small amounts), non-surgical nose (high risk, requires careful consideration). General principle: compensate in areas of deficiency for support, not to fill directly into wrinkles; use moderate amounts and divide doses.
Vascular Safety — The Most Important Factor
Injecting gel into blood vessels or compressing vessels can cause vascular occlusion: skin pallor, pain, localized bruising, necrosis; in the nose, glabella, and smile lines, there are branches connecting to the eyes — although rare, this can lead to vision loss. Risk can be minimized by: understanding vascular anatomy, using a blunt-tipped cannula in high-risk areas, aspirating, injecting slowly in small amounts, and always having hyaluronidase available to dissolve the gel if suspicion arises. This is why fillers must be administered by a licensed physician in a certified facility.
Other Risks
Swelling and bruising for 3–7 days, lumps or small bumps (which can be massaged or dissolved), Tyndall effect (blue tint under thin skin when injected superficially), asymmetry, product migration, late inflammatory reactions (rare), and infection (rare). The advantage of HA is that all these issues can be reversed with dissolving agents.
At BonBoz
Aesthetic dermatologists conduct direct consultations, identify areas of deficiency and contouring goals, select products that are registered for use with appropriate hardness for each area, use cannulas in high-risk zones, and inject slowly in moderate amounts divided into sessions. The clinic always has hyaluronidase on hand; the physician provides guidance on signs that require immediate contact and schedules a follow-up after 2–4 weeks.
