Dermal Fillers

Dermal fillers are injectable substances placed under the skin to add volume, soften wrinkles and folds, and reshape features such as the cheeks, lips, chin, or jawline. The most common products are made from hyaluronic acid (HA), a naturally occurring sugar that attracts water; other options include calcium hydroxylapatite, poly-L-lactic acid, and polymethylmethacrylate microspheres. HA fillers are popular partly because they can be dissolved with an enzyme called hyaluronidase if needed. Different products have different thicknesses and are chosen for specific areas and depths.

A treatment visit usually lasts 15 to 60 minutes. The injector cleans the skin, may apply topical numbing cream, and injects filler through a fine needle or a blunt cannula. Many fillers contain lidocaine to reduce discomfort. You can typically return to normal activities the same day, though swelling, redness, tenderness, and bruising are common for a few days. Results are visible immediately and settle over one to two weeks as swelling resolves. Depending on the product and area, effects last roughly 6 to 18 months before gradual reabsorption.

Randomized controlled trials and manufacturer-sponsored studies support that hyaluronic acid fillers effectively improve nasolabial folds, lip volume, and cheek contour for months, and FDA approvals rest on such trials. Systematic reviews report generally high patient satisfaction with predominantly mild, temporary side effects. However, much of the research is industry-funded and short-term, head-to-head comparisons between brands are limited, and long-term safety data beyond two years are relatively sparse. Evidence for newer indications and off-label areas is weaker and based mainly on case series and expert consensus.

Common effects include swelling, bruising, redness, and lumps. Rare but serious risks include vascular occlusion causing skin death or, very rarely, blindness, plus infection, nodules, and delayed immune reactions. Avoid if pregnant, breastfeeding, or with active skin infection or known hypersensitivity.