Dermal Fillers

Dermal fillers are gel materials injected beneath the skin to add volume, support tissue, and refine the contour of the face. They are a nonsurgical, in-office treatment used to counter the loss of facial volume that occurs with age, to soften folds and hollows, and to shape features such as the lips, cheeks, chin, jawline, and temples. The most widely used fillers are made of hyaluronic acid, a sugar molecule that occurs naturally in skin and binds water, but several other materials are also used for specific purposes.

Aging the face is not only a matter of lines and sagging. Over time, the deeper fat compartments deflate and shift, bone gradually resorbs, and the skin loses elasticity. The result is a loss of the underlying support that gives a youthful face its smooth transitions — flatter cheeks, hollowing under the eyes and at the temples, deepening folds from the nose to the mouth, and a less defined jawline. Fillers address this by replacing or redistributing volume in a targeted way, restoring support where it has been lost or adding definition where a patient wants it.

Hyaluronic acid fillers come in families with different physical properties. Some are firmer and more supportive, suited to deep placement on bone to rebuild cheek or chin projection; others are soft and spreadable, suited to fine work in the lips or fine lines. These properties — described by terms such as firmness (often discussed as G prime) and cohesivity — guide which product is chosen for which area. A meaningful advantage of hyaluronic acid fillers is that they can be dissolved with an enzyme called hyaluronidase if a result needs to be adjusted or, importantly, if a complication occurs.

At Norelle Health in New York City, filler treatment is planned as facial shaping rather than as filling individual lines. The consultation focuses on understanding where volume has been lost or where balance can be improved, choosing the appropriate product and placement, and setting realistic expectations. Fillers are well suited to volume and contour; they do not relax the muscles that create movement lines (the role of neuromodulators) and they do not resurface sun-damaged skin (the role of laser resurfacing). These are frequently combined as part of a wider plan.

Filler placement is planned around the patient's face and goals. Common areas include:

• Cheeks and midface, to restore deflated volume and re-support the area, which can also soften the fold from the nose to the mouth indirectly.
• Under-eye hollows (tear troughs), a delicate area requiring careful technique and patient selection, used to soften shadowing where appropriate.
• Nasolabial folds (nose to mouth) and marionette lines (mouth corner to chin), softened by support rather than by filling the crease directly.
• Lips, for subtle volume, definition of the border, or balancing of shape and proportion.
• Chin, to improve projection and balance the profile in patients who do not need or want a surgical implant or genioplasty.
• Jawline, to add definition and a cleaner transition along the lower face.
• Temples, to soften hollowing that contributes to a tired or aged appearance.
• Nonsurgical refinement of the nose, used cautiously in selected cases, an area that requires particular care because of vascular risk.

Treating the face as a whole — restoring support where it has been lost — often gives a more natural result than chasing individual lines.

Beyond vascular events, fillers have a range of more common, less serious effects and some uncommon ones.

• Bruising, swelling, redness, and tenderness at the treated sites, which usually resolve within days to about two weeks. The lips and under-eye area tend to swell more.
• Lumps or unevenness, which can sometimes be smoothed by massage, settle on their own, or be adjusted; HA filler can be dissolved if needed.
• Asymmetry, which can often be corrected at a follow-up.
• The Tyndall effect, a bluish discoloration that can occur when HA filler is placed too superficially, particularly under the eyes; it can be dissolved.
• Infection, which is uncommon, and reactivation of cold sores around the mouth in susceptible patients.
• Delayed inflammatory nodules, an uncommon late reaction that can occur months after treatment and is managed medically.
• Migration or persistence of product, more relevant to certain areas and products.

Treatment is generally avoided during active skin infection at the site, in pregnancy and breastfeeding, and with known allergy to a product's components. A history of cold sores, prior filler, autoimmune conditions, and blood thinners are reviewed beforehand, as they affect planning and risk.