Dermal Fillers: The Decision Before the Injection
Filler restores volume and refines contour. It does not lift tissue that has descended, and it cannot correct ptosis. This site is about the decision rather than the product: which substance class reaches your problem, whether the result should be reversible, how much is too much, and what you would do in the rare emergency that every filler patient should be able to recognise.
Chongqing West District Hospital, a tertiary general hospital in Jiulongpo District, Chongqing. Every filler result is temporary, maintenance treatment is required, and no outcome can be guaranteed.
What you are deciding, in seven lines
Filler replaces volume and refines contour. It does not lift, and it does not tighten: a face that has descended needs a different conversation, and filler placed into laxity usually makes it read heavier rather than lifted. There are several substance classes, and they are not interchangeable: hyaluronic-acid fillers are the reversible class, while calcium hydroxylapatite, poly-L-lactic acid and polynucleotides are not reversible with an enzyme and behave differently over time. Reversibility is the first decision, not a footnote, because it is the only thing that can be undone if you dislike the result or a complication develops. Every filler result is temporary and maintenance is required; duration varies from months to considerably longer depending on the area, the class and your own response. Over-treatment is harder to correct than under-treatment, which is why a conservative first plan with a review at about two weeks is the standard approach rather than a cautious one. Vascular occlusion — filler blocking a blood vessel — is a time-critical emergency that can cause skin loss and, rarely, vision loss; it is rare, it is the reason filler belongs in a setting that can act immediately, and every patient should know its signs before treatment rather than after. Nothing here corrects ptosis, and a thread lift is not a facelift.
Four things filler can change — and three it cannot
The consultation turns a general wish to look less tired into one of these. Naming which one you have is most of the decision, because filler is the wrong tool for three of them.
Volume
Temples, mid-face, tear trough and jaw hollows lose volume with age, and restoring it changes how the whole face reads. This is what filler does best.
Contour
Definition along the jawline, the chin and the cheekbones can be refined rather than merely filled. Contour changes are less forgiving than volume changes, and they are where over-treatment shows first.
Folds created by volume loss
Nasolabial folds and similar lines are often the shadow of lost support rather than a line in the skin. Restoring the support is the mechanism, not filling the crease itself.
Skin hydration and quality
Some injectable classes are used for skin quality rather than for shape. They change the surface and the tissue rather than the silhouette, and they are assessed as a separate problem.
Ptosis — not changed
Filler cannot correct a drooping brow, eyelid or cheek. Adding volume to tissue that has descended does not lift it, and it can make the descent read as heaviness instead.
Laxity — not changed
Loose skin is a different problem from lost volume. Energy-based tightening or an operation addresses it. A thread lift is not a facelift, and filler is not a lift at all.
A skeletal discrepancy — not changed
Where a profile problem comes from the underlying bone or the bite, filler in front of it does not change the relationship. That is a surgical or orthognathic question.
Who tends to be a good candidate — and who should wait
The strongest candidates have lost volume or definition rather than tissue support, have healthy skin over the intended area, are not pregnant or breastfeeding, have no active infection, and can accept a temporary result with a maintenance commitment. They can also describe what they want changed in terms of how their face reads rather than in terms of a product, and they accept that other people may notice nothing at all.
Several groups should wait or be redirected. Anyone whose dominant concern is sagging or a drooping brow should be told plainly that filler will not correct ptosis, and that the honest options are energy-based tightening or surgery. Anyone with a history of autoimmune or inflammatory conditions, or of previous delayed reactions to filler, needs that assessed and documented rather than treated casually. Anyone with active infection, inflammation or broken skin over the intended area should be treated first. Anyone taking anticoagulant medication or with a bleeding disorder needs that discussed. And anyone who is pregnant or breastfeeding should postpone elective treatment.
There is also a group that should not start at all: patients who want a permanent solution. Filler cannot provide one, and a patient for whom the temporariness is unacceptable is better served by discussing a surgical option honestly than by a course of injections that will be experienced as a recurring disappointment.
The classes, and what each commits you to
Fillers are described here by substance class rather than by product, because the class decides how the material behaves, how long it lasts and whether it can be undone. The comparison that matters is reversibility, not brand.
Hyaluronic acid
The reversible class. It can be dissolved with an enzyme, which is the only reliable reversal available in filler practice. Duration varies by area and formulation, generally months. This is the class most first treatments should use.
Calcium hydroxylapatite
A non-reversible class with a firmer consistency, used where structural support is wanted. It cannot be dissolved, so a misplaced result has to be managed rather than reversed.
Poly-L-lactic acid
A collagen-stimulating class that works gradually through the tissue response rather than by immediate volume. Results build over months, are not immediate, and are not reversible.
Polynucleotides
A newer class used for tissue quality and skin rather than for volume or contour. The evidence base is younger, and it is offered here with that stated rather than implied.
Autologous fat
Your own tissue, placed surgically rather than injected in a clinic setting. No foreign material, but an unpredictable proportion is reabsorbed and a donor site is added. It is a procedure rather than an appointment.
The timeline that replaces recovery
There is no wound to heal here, so what follows is not a recovery timeline. It is an onset-and-duration timeline: how the result appears immediately, how it changes as swelling settles, when it should be judged, and how it fades. Bruising, if it happens, resolves within a week, but the clinical story is the filler settling and then dissipating.
The practical consequence is that the honest point to judge a result is about two weeks, not the same evening. The day-one appearance is dominated by swelling and by filler that has not yet integrated with the tissue, and judging it then is unreliable in both directions. A review at two to four weeks is what allows a conservative first plan to be corrected, and it is the reason a staged approach is standard.
The last point is the one patients underestimate. Filler is temporary, the duration varies widely by area and class, and maintenance is required to keep a result continuous. Anyone who wants a single appointment to solve a volume problem permanently is choosing the wrong treatment, and the assessment should say so.
What can go wrong, stated plainly
The most serious risk of filler is vascular occlusion. Filler can obstruct a blood vessel, and the tissue that vessel supplies is then starved of blood. This is a time-critical emergency: it can cause skin loss and, rarely, vision loss, and the outcome depends on how quickly it is recognised and treated. It is uncommon, it is the reason filler belongs in a setting with immediate access to the equipment and expertise to manage it, and every patient should know its signs before treatment rather than afterwards. Severe pain out of proportion to the injection, or skin turning white, grey, mottled or dusky, requires immediate assessment. Any change in vision requires emergency care.
Beyond that, the more common problems are nodules and lumps, which may need treatment or dissolution; infection at an injection site; asymmetry or over-correction; and migration of filler away from the intended area, which is a particular concern in mobile areas of the face. Delayed inflammatory reactions can appear weeks to months after treatment, sometimes after an unrelated illness or dental procedure, and they are managed rather than ignored.
- Vascular occlusion — a time-critical emergency that can cause skin loss and, rarely, vision loss.
- Nodules, lumps, delayed inflammatory reactions, infection, asymmetry or migration of product.
- Over-correction, which is harder to correct than under-correction, and the fact that all filler results are temporary and require maintenance.
Finally, the limits. Filler cannot correct ptosis, cannot tighten lax skin, and is not a lift. A thread lift is not a facelift. Where those are the real concerns, the honest recommendation is a different treatment.
What else is on the table — including doing nothing
Doing nothing is a reasonable option, and for early volume loss it is often the best one. Facial volume changes with age in everyone, and the decision to treat it is aesthetic rather than medical. It is worth noticing how much of the pressure to treat comes from comparison with filtered images rather than from your own reflection.
- Skin-quality treatment instead. If the concern is texture, tone or fine surface lines rather than volume, the target is the skin, and the relevant options are topical care and energy-based or microneedling treatment.
- Energy-based tightening. Where skin laxity rather than volume is the issue, a device-based treatment addresses the tissue. Filler in a lax face typically reads as heavier rather than lifted.
- Surgery. Where tissue has descended, a lift is the treatment that addresses it. A thread lift is not a facelift, and filler is not a lift; where a lift is indicated, an injectable is not a substitute.
- A muscle relaxant instead. A line produced by movement is treated by relaxing the muscle, and volume added to it achieves little. The assessment decides which component dominates.
- Waiting. Nothing about filler is urgent, and a decision deferred by six months costs nothing except the result you did not have.
Who reviews these guides
Ke He, MD, Deputy Director of the Plastic Surgery & Aesthetics Medical Center and head of its skin and laser aesthetic service, is the responsible physician for this site. She is an attending physician and licensed aesthetic attending whose practice is entirely non-surgical: she assesses the face at rest and in movement, decides which substance class — if any — actually reaches the problem, and stays responsible for the protocol when something does not go as planned. Her injectable scope is framed by substance class rather than brand, and her stated discipline is deliberate under-treatment with refinement at review. Her full credentials, memberships and publications are listed on the medical team page. Every guide here is reviewed against her clinical judgement before publication and reviewed again on a twelve-month cycle.
The rest of the cluster
The medical system behind injectable treatment — the substance classes, how they are placed by facial zone, how they are combined and sequenced — is explained by the injectables and minimally invasive aesthetics authority site. Dr. He’s own practice and assessment process are set out on her physician site. Where a line is a movement problem rather than a volume problem, the cluster’s wrinkle-relaxing injections site covers that decision. Before any treatment, quality and surgical safety describes how safety is organised inside the hospital, and appointments explains how to arrange an assessment.
The onset-and-duration timeline
This is not a wound-healing timeline, because injection leaves no wound to heal. It is an onset-and-duration timeline: how the result appears immediately, how it changes as swelling settles, when it should be judged, and how it fades. Durations vary widely by area and substance class, and your own response sets your maintenance interval.
The decision guides
Each guide answers one decision. Read the two or three that match your situation rather than all of them.
Should I Have Filler? A Decision Path
Four questions decide most filler consultations: is the problem volume or support, which substance class reaches it, and what to do if you dislike the result.
Read the guide →Filler Candidacy: What the Assessment Checks
Filler candidacy assesses volume, contour, skin quality and tissue support, plus the medical history that changes risk. Sometimes it is the wrong treatment.
Read the guide →Choosing by Substance Class, Not by Name
Hyaluronic acid, calcium hydroxylapatite, poly-L-lactic acid and polynucleotides behave, last and reverse differently. The class matters more than the name.
Read the guide →Reversibility First: The Question to Settle Before You Start
Only the dissolvable gel class can be reliably dissolved. Whether your result can be undone is the first decision in filler treatment, not a footnote to it.
Read the guide →Vascular Occlusion: The Emergency Every Filler Patient Should Know
Filler can block a blood vessel. It is rare and time-critical, it can cause skin loss and, rarely, vision loss, and knowing the signs is part of consent.
Read the guide →Too Much Filler: Why Over-Treatment Is Hard to Correct
Filler accumulates, changes how a face reads rather than how full it is, and cannot always be removed. That should shape every plan, especially the first.
Read the guide →Ready to discuss what a filler can — and cannot — do?
Reach out for a consultation. We will assess your face at rest and in movement, explain which substance class reaches the problem and which does not, and plan conservatively, staged across visits.
Frequently asked questions
How long does filler last?
It varies widely with the area treated, the substance class and your own response, from months to considerably longer. What does not vary is that it is temporary. Maintenance treatment is required to keep a result continuous, and your own interval is more useful than any published average.
Can filler be dissolved?
Only the hyaluronic-acid class can be reliably dissolved with an enzyme. Calcium hydroxylapatite, poly-L-lactic acid and polynucleotides cannot. That difference is the first thing to settle when choosing a class, because it is the only thing that can be undone if you dislike the result or a complication develops.
What is the most serious risk?
Vascular occlusion, in which filler blocks a blood vessel. It is a time-critical emergency that can cause skin loss and, rarely, vision loss, and the outcome depends on how fast it is recognised and treated. Severe pain out of proportion to the injection, or skin turning white, grey, mottled or dusky, requires immediate assessment, and any change in vision requires emergency care.
Does filler lift a sagging face?
No. Filler restores volume and refines contour; it does not lift tissue that has descended, and it cannot correct ptosis. Adding volume to a lax face usually makes it read heavier rather than lifted. Where laxity is the real concern, the honest options are energy-based tightening or an operation.
Is it possible to have too much filler?
Yes, and over-treatment is harder to correct than under-treatment. It is also cumulative over years, and it changes how a face reads rather than simply how full it is. This is why a conservative first plan with a review at about two weeks is the standard approach rather than a cautious one.
What happens if I stop having maintenance?
The result fades over months and your face returns to its own pattern. There is no withdrawal effect and no harm, though a long gap means a correction is judged from scratch rather than topped up. Stopping is a legitimate decision and does not need to be negotiated.
Part of Facial Volume Loss and Hollowing — 8 sites on this topic