Few aesthetic treatments are as widely misunderstood as dermal fillers. To some they mean overinflated lips and pillowy cheeks; to others they are a subtle way to restore the structure a face gradually loses with age. Both pictures contain a grain of truth, because “filler” is not a single product but a whole family of them, used in very different ways. This guide explains what dermal fillers actually are, the main types, what they can and cannot treat, how long results last, what they cost in the UK — and, most importantly, how to weigh the risks and choose a clinic you can trust.
What are dermal fillers?
Dermal fillers are injectable gels placed beneath the skin to restore lost volume, smooth out folds and define facial contours. The great majority of modern fillers are based on hyaluronic acid (HA) — a sugar molecule that occurs naturally in your skin’s supporting matrix. HA is intensely water-loving, binding many times its own weight in water, which is what gives filler its plumping, hydrating effect.
In its raw form, HA is too runny and breaks down too quickly to be useful, so manufacturers cross-link the molecules with a bonding agent (most commonly BDDE) to turn the liquid into a stable gel. The degree of cross-linking is what sets one product apart from another: stiffer, more heavily cross-linked gels give firm structural support for cheeks and jawlines, while softer gels suit delicate work like lip hydration and fine lines. Crucially, those bonds remain biodegradable, which is why HA fillers are reversible — a point we return to below.
It is worth being clear on one distinction from the start: fillers are not the same as Botox. Anti-wrinkle injections are prescription-only medicines that relax muscles; fillers restore volume. In the UK, HA fillers are currently classed as Class III medical devices rather than medicines, a regulatory difference that has real consequences for quality and oversight.
The main types of dermal filler
Not all fillers work the same way. The three broad categories differ in what they are made of, how they achieve their effect and — critically — whether they can be dissolved.
| Filler type | What it is | How it works | Common brands | Reversible? |
|---|---|---|---|---|
| Hyaluronic acid (HA) | Cross-linked HA gel | Immediate volume plus water retention; mild collagen stimulation over time | Juvéderm, Restylane, Teoxane RHA, Revolax | Yes — with hyaluronidase |
| Calcium hydroxylapatite (CaHA) | Microspheres in a gel carrier | Instant lift from the carrier, then stimulates the skin’s own collagen | Radiesse | No |
| Poly-L-lactic acid (PLLA) | Biodegradable polymer particles | Adds little volume directly; prompts gradual collagen build over weeks to months | Sculptra | No |
The headline difference is this: HA fillers work instantly and can be dissolved, whereas CaHA and PLLA are “biostimulators” — they work more slowly with your own collagen and cannot be reversed with an enzyme. That irreversibility is a significant safety consideration, and a good reason many practitioners favour HA, especially for newer patients.
Which areas can dermal fillers treat?
Fillers are used across the face (and increasingly the hands) to replace volume that has been lost or to enhance natural structure. Common treatment areas include:
- Lips — for definition, shape and subtle volume (see our lip fillers guide)
- Cheeks and mid-face — restoring the youthful curve that flattens with age
- Tear troughs — softening under-eye hollows and shadows, a delicate area covered in our tear trough filler guide
- Jawline and chin — adding definition and structural support
- Nasolabial folds — the nose-to-mouth lines that deepen over time
- Temples — refilling hollowing that can make the face look gaunt
- Non-surgical rhinoplasty — camouflaging small bumps or asymmetries in the nose
The unifying principle is that filler is best at restoring or refining structure, not defying gravity. It will not lift significant skin laxity, and it is not a substitute for surgery where genuine sagging is the main concern. An honest practitioner will tell you when filler is the wrong tool.
How long do dermal fillers last?
Fillers are temporary — your body gradually breaks the gel down. How quickly depends on the area, how much it moves, your own metabolism and the product used. As a general guide:
| Area | Typical longevity |
|---|---|
| Lips | 6–9 months (high movement, faster breakdown) |
| Nasolabial folds | 9–12 months |
| Cheeks | 12–18 months (some structural products up to 24) |
| Jawline | 12–24 months |
| Tear trough | 12–18 months, sometimes longer in low-movement areas |
These are ranges, not promises. Someone with a fast metabolism or a very expressive face may find results fade sooner. Maintaining the look therefore means repeat sessions over time — an ongoing commitment of both money and clinic visits worth factoring in before you start.
The shift towards natural, structural results
The most notable trend in recent years has been a decisive move away from the “overfilled” look of the late 2010s. Rather than plumping lips and cheeks at the surface, skilled injectors now favour structural restoration — rebuilding support at deeper points so the face looks lifted and refreshed rather than inflated.
The best-known version of this is the 8-point lift (sometimes called a “liquid facelift”), a mapped technique that places filler at strategic points across the cheekbones, mid-face and jawline to restore support the whole face has lost. It typically uses 2–4ml of filler and produces immediate results that refine over about two weeks as swelling settles.
Used well, filler today is less about adding volume and more about giving the face back the scaffolding it has lost. The aim is for people to think you look well-rested, not “done”.
What do dermal fillers cost in the UK?
Fillers are usually priced per syringe or per area. As a rough 2026 guide, a single syringe runs from around £200 to £600, while multi-area or structural treatment plans commonly reach £600 to £1,500 or more. Delicate or complex work costs more:
| Treatment area | Typical UK price |
|---|---|
| Lips (0.5–1ml) | £200–£450 |
| Cheeks (per side) | £300–£600 |
| Tear trough | £350–£700 |
| Jawline contouring | £350–£1,200 |
| Non-surgical rhinoplasty | £400–£900 |
London and the South East typically sit 15–40% higher than the rest of the UK, and price also tracks the practitioner’s background — a cosmetic surgeon or dermatologist will usually charge more than a nurse prescriber. As with any medical treatment, the cheapest quote is rarely the wisest choice: product quality, training and aftercare matter far more than the headline figure.
Safety: the risks worth understanding
For most people, side effects are mild and short-lived — bruising, swelling, redness and tenderness that settle within a week or two. Lumps, asymmetry or an over-filled appearance can also occur, though with HA these can usually be adjusted or dissolved.
The complication that truly matters is vascular occlusion: filler accidentally injected into, or pressing on, a blood vessel. If blood flow is cut off, the tissue can begin to die (necrosis), and in rare cases involving vessels near the eye, occlusion can cause blindness. Certain zones — the glabella between the brows, the nose and the tear trough — carry higher risk. This is uncommon in trained hands, but it is precisely why detailed facial anatomy knowledge, and immediate access to hyaluronidase, are non-negotiable. Later risks, such as infection, nodules or granulomas, are also part of proper informed consent.
No reputable practitioner will ever guarantee a perfect result or dismiss these risks. If a clinic glosses over complications or cannot explain how they would handle an emergency, treat that as a warning sign.
Reversibility: the hyaluronidase safety net
One of the biggest advantages of HA fillers is that they can be undone. Hyaluronidase is an enzyme that breaks HA down, and it is used both to correct unwanted results — lumps, asymmetry, migration or simply a look you dislike — and as the emergency treatment for vascular occlusion, where it is injected urgently to restore blood flow. A dissolving session typically starts at around £150–£250.
The catch is that only HA fillers can be reversed this way. CaHA (Radiesse) and PLLA (Sculptra) have no dissolving agent, so if you are unhappy with them you must wait for the body to absorb them naturally. For many people, that reversibility alone is a strong argument for starting with HA.
Regulation and choosing well
Because HA fillers are regulated as medical devices rather than medicines, they require only CE or UKCA marking — not the clinical safety and efficacy data demanded of a drug. Campaigners have long flagged this as a gap that lets lower-quality products onto the market. Change is coming: the government’s August 2025 announcement named lip and facial fillers as procedures that will fall under a new local authority licensing scheme, requiring practitioners to meet training, safety and insurance standards, and moves are underway to ban filler and anti-wrinkle procedures for under-18s. The highest-risk filler procedures are being restricted to CQC-registered providers as a priority.
Until statutory regulation fully lands, the responsibility to choose carefully sits with you. Look for a practitioner with a genuine medical or dental qualification, appropriate insurance, and ideally registration with the Joint Council for Cosmetic Practitioners (JCCP), whose voluntary register is designed to help the public identify safer, properly trained injectors. Ask what product they use, how they manage complications, and whether hyaluronidase is kept on site.
Making an informed choice
Dermal fillers can be a subtle, effective way to restore volume and refresh facial structure — provided you go in with realistic expectations, understand the risks and choose an experienced, properly qualified practitioner. They are temporary, they are not magic, and they are not risk-free. If you are weighing filler against gentler skin-quality treatments, our comparison of Profhilo versus dermal fillers explains where each one fits.
Above all, the clinic and the person holding the syringe matter more than the brand of gel. Use Clinic Finder to compare accredited clinics near you, verify your practitioner’s credentials and training, and ask the questions that separate a safe, honest provider from a risky one before you book.
