At a glance
Downtime: Little to none; bruising and swelling for a few days
Sessions: 1 visit; touch-ups as the filler fades
Typical Cost: About $600–$1,200 per syringe (varies by filler and area)
Results Timeline: Immediate, with the final look in 1–2 weeks once swelling settles
Evidence Level: Strong — well studied, with a good safety record when done by a trained injector
How it works
Fillers add volume where the skin has lost it or where lines have formed. A provider injects a soft gel under the skin with a fine needle or a blunt tube called a cannula. The gel plumps the area from below, so lines look softer and hollows look fuller.
Most fillers today use hyaluronic acid (HA). HA is a sugar your body already makes. It holds water, so it adds volume and a smooth look. HA fillers are popular because they can be dissolved if needed with an enzyme called hyaluronidase.
Other fillers work in different ways. Some use calcium beads (calcium hydroxylapatite) or poly-L-lactic acid. These add volume and also nudge the body to make its own collagen over time. Because they cannot be dissolved, they need a careful, skilled injector.
Fillers are not the same as botulinum toxin (Botox). Botox relaxes muscles to soften lines from movement. Fillers add volume to fill lines and hollows. Some people use both.
What to expect
Before: Avoid blood thinners, fish oil, and alcohol for a few days if your provider allows, since these raise bruising. Come with a clean face and clear goals. A good injector will map out where to place the filler.
During: Numbing cream, or numbing mixed into the filler, is common. You may feel pressure or a pinch. A single area often takes 15–30 minutes. You can usually see the change right away.
After: Expect some swelling, redness, and possible bruising for a few days. Avoid heavy exercise, heat, and pressure on the area for a day or two. Do not massage the area unless told to.
Results: You see a change right away, but the final look settles in 1–2 weeks once swelling fades. HA fillers usually last 6–18 months, depending on the type and area. Lips fade faster than cheeks. Touch-ups keep the result.
Side effects & risks
Common and expected:
- Swelling, redness, and bruising for a few days
- Tenderness or firm lumps that soften over 1–2 weeks
- Mild pain at the injection site
Uncommon but possible:
- Lumps or bumps that last and may need to be dissolved or smoothed
- Infection at the site
- The Tyndall effect — a bluish tint when HA filler is placed too shallow
- Long-lasting swelling or a delayed immune reaction
Rare but serious:
- Vascular occlusion. This is when filler blocks a blood vessel. It can cut off blood flow and, in rare cases, damage skin or cause vision loss. It is a medical emergency. Choosing a trained medical injector who knows the face's blood vessels lowers this risk.
A note on skin tone: People with darker skin have a higher chance of dark marks or raised scars where the needle enters. A gentle technique and fewer injection points can help.
Who it's not for
Fillers may not be right if you:
- Are pregnant or nursing (usually postponed as a precaution)
- Have an active skin infection or cold sore in the area
- Have a history of strong allergic reactions or a known allergy to a filler ingredient
- Have a bleeding disorder or take strong blood thinners
- Have a history of keloid scars (discuss first)
- Have an autoimmune condition (talk with your doctor)
- Are looking to lift heavy sagging skin — that needs surgery, not filler
Choosing the right injector matters as much as the filler. Look for a licensed medical provider who injects often and knows facial anatomy.
Frequently asked questions
Q: How long do fillers last?
A: Most hyaluronic acid fillers last 6–18 months. Thin areas like the lips fade faster. Firmer fillers in the cheeks last longer. The body slowly breaks the filler down, so touch-ups keep the look.
Q: How much do fillers cost?
A: Often about $600–$1,200 per syringe. You may need more than one syringe. Firmer or collagen-building fillers can cost more. Prices vary by area and injector.
Q: Do fillers hurt?
A: Most people feel a pinch and some pressure. Numbing cream or numbing mixed into the filler makes it easier. Areas like the lips are more tender.
Q: Can fillers be reversed?
A: Hyaluronic acid fillers can be dissolved with an enzyme called hyaluronidase. This helps if you dislike the result or have a problem. Fillers made of calcium or poly-L-lactic acid cannot be dissolved.
Q: What is the most serious risk?
A: The most serious risk is filler blocking a blood vessel (vascular occlusion). It is rare but can harm the skin or, very rarely, eyesight. A trained medical injector who knows facial blood vessels lowers this risk.
Q: Is there downtime?
A: Very little. Most people return to daily life right away. You may have swelling or bruising for a few days, so many plan around big events.