Dermal fillers are injectable gels or suspensions that add volume beneath the skin, smoothing wrinkles and restoring fullness to areas like the cheeks, lips, and jawline. Unlike surgical implants, fillers are delivered through a needle or small cannula in an office visit that typically takes 15 to 45 minutes. Most are temporary, lasting anywhere from 6 months to over 2 years depending on the material used. The average cost in the U.S. runs about $750 per syringe, with a typical syringe holding 1 mL of product.
How Fillers Work
Fillers are injected into the skin rather than the muscle. Once placed, they physically occupy space beneath the surface, pushing the skin outward to fill in lines, hollow areas, or flat contours. The most common filler material, hyaluronic acid, is a sugar molecule that already exists naturally in your skin and cartilage. It works by binding up to 1,000 times its weight in water, which is what gives it that plumping, gel-like effect. Your body contains roughly 15 grams of hyaluronic acid at any given time, with nearly half of it in the skin, so injecting a modified version of the same molecule is well tolerated.
Not all fillers work the same way, though. Some newer materials don’t just fill space. They stimulate your body to produce its own collagen over weeks and months, creating volume gradually rather than immediately.
Fillers vs. Botox
People often confuse fillers with Botox, but they do fundamentally different things. Botox is a neuromodulator that relaxes muscles. It targets dynamic wrinkles, the lines that appear when you move your face, like crow’s feet when you squint or forehead lines when you raise your eyebrows. Botox is injected into the muscle itself.
Fillers target static wrinkles, the lines and folds visible even when your face is completely relaxed, like the creases running from your nose to the corners of your mouth. Fillers are injected into the skin, not the muscle, and they physically add volume rather than relaxing anything. Many people use both: Botox for the upper face (forehead, eye area) and fillers for the mid and lower face (cheeks, lips, jawline).
Types of Filler Materials
The FDA groups approved fillers into two broad categories: absorbable (temporary) and non-absorbable (permanent). Most fillers used today are temporary.
Hyaluronic Acid (HA)
This is by far the most popular category and includes brand names like Juvederm, Restylane, and Belotero. HA fillers are chemically crosslinked to make them last longer than the natural version in your body, which breaks down within about 24 hours. Depending on the product and treatment area, results last roughly 6 to 18 months. A major advantage of HA fillers is that they can be dissolved. If you don’t like the result or a complication arises, an enzyme called hyaluronidase can break down the filler and reverse the effect. Pricing runs from about $550 per syringe for Belotero up to $800 for certain Juvederm products.
Calcium Hydroxylapatite (CaHA)
Sold as Radiesse, this filler uses tiny particles of a mineral naturally found in your teeth and bones, suspended in a gel. It’s FDA-approved for moderate to severe facial wrinkles and folds, particularly the nasolabial folds (nose-to-mouth lines), marionette lines, and chin. Results typically last about 12 to 18 months. A syringe costs between $750 and $950. Unlike HA fillers, CaHA cannot be dissolved with an enzyme.
Poly-L-Lactic Acid (PLLA)
Sold as Sculptra, this material works differently from traditional fillers. Rather than creating instant volume, PLLA stimulates your body’s own collagen production over time. During the first six months after injection, collagen levels steadily increase around the PLLA particles. Between 6 and 24 months, type I collagen (the strongest structural form) continues to build significantly. Because results develop gradually, Sculptra is given as a series of injections spread over several months. The effects can last up to two years. Expect to pay $850 to $1,200 per syringe.
PMMA Microspheres
The only FDA-approved permanent filler material uses polymethylmethacrylate beads suspended in a collagen-based gel. Because the beads are not absorbed by the body, the results are long-lasting. However, permanence is a double-edged sword: if something goes wrong or you dislike the result, correction is far more difficult than with temporary fillers.
Liquid silicone and silicone gel injections are not FDA-approved for filling wrinkles or augmenting tissue anywhere in the body.
What Treatment Areas Fillers Address
Fillers are used across the face, and the specific product chosen often depends on the area being treated. Common uses include:
- Nasolabial folds: the lines running from the nose to the mouth corners
- Marionette lines: creases from the mouth corners down toward the chin
- Cheeks: restoring volume lost with age or adding contour
- Lips: adding fullness or defining the lip border
- Under-eye hollows (tear troughs): reducing the sunken appearance beneath the eyes
- Jawline and chin: sharpening definition or correcting asymmetry
- Backs of the hands: reducing visible tendons and veins
Most areas require one to two syringes per session, though cheek and jawline treatments may need more. The number of syringes is the primary driver of total cost.
What the Procedure Feels Like
Providers use either a traditional needle or a blunt-tipped cannula to inject filler. Needles offer greater precision and allow the provider to place product at very specific depths, which matters in delicate areas like the tear trough. Cannulas cause slightly fewer bruises and feel less sharp, but they’re less precise in controlling exactly where the filler ends up. Many providers use a combination of both depending on the area.
Most fillers contain a numbing agent mixed into the gel, and providers typically apply a topical anesthetic cream before starting. You’ll feel pressure and mild stinging, but the procedure is generally tolerable. The whole appointment, including numbing time, usually wraps up within an hour.
Recovery and Side Effects
Swelling and bruising are the most common side effects, and both typically resolve within a few days to two weeks. You may also notice redness, tenderness, or mild pain at the injection sites for the first day or two. Results with HA and CaHA fillers are visible immediately, though the final look settles in once swelling subsides, usually within one to two weeks.
With PLLA (Sculptra), the timeline is different. You’ll see some initial volume from the liquid carrier, but this fades within days. The real results build gradually as collagen forms, becoming increasingly noticeable over several weeks to months.
Serious complications are uncommon but worth understanding. The most significant risk is vascular occlusion, which occurs when filler is accidentally injected into or compresses a blood vessel. This can block blood flow to the skin or, in rare cases, to the eye. Warning signs include unusual blanching (whitening) of the skin, severe pain disproportionate to the injection, or any vision changes. With HA fillers, this can be treated by dissolving the filler with hyaluronidase, which works quickly when administered promptly. This reversibility is one reason HA fillers remain the most widely recommended option, especially for people new to injectables.
How Fillers Compare to Fat Grafting
Fat grafting is a surgical alternative where fat is harvested from another part of your body through a gentle liposuction technique, processed, and then reinjected into the face. It’s a more involved procedure. You’ll have a donor site (often the abdomen or thighs) with its own bruising and recovery, and the injection process itself involves more pressure sensation than a simple needle stick. Fat grafting is also more technically demanding for the provider.
The tradeoff is that fat grafting uses your own tissue, eliminating any risk of allergic reaction to synthetic materials. However, results from off-the-shelf fillers like HA and Sculptra can last up to two years as well, making the durability gap smaller than many people expect. For most patients looking to restore facial volume without surgery, dermal fillers offer a simpler entry point with less downtime.