Lip fillers in Singapore are injections of hyaluronic acid gel into the lip border, body and Cupid's bow to restore or add volume, definition and hydration. Because the gel can be dissolved with hyaluronidase, the work is adjustable. A lip flip uses a micro-dose of BTX instead and adds no volume; which suits you follows a proportion assessment.
- What Is Lip Filler?
- Natural vs. Overdone — The Difference
- How Long Does Lip Filler Last?
- The Procedure — What to Expect
- Choosing a Provider
- Lip filler or lip flip: what is the difference?
- What can go wrong with lip filler, and how is it managed?
- Who should not have lip filler?
- Lip fillers in Singapore: what affects the cost?
- How Dr Sin Yong approaches lip filler
- Lip shapes and proportions: what a doctor looks at
- Frequently Asked Questions
- What it is
- Hyaluronic acid (HA) gel placed in the lip body, vermilion border and Cupid's bow
- Reversibility
- HA can be dissolved with hyaluronidase if it needs adjusting or reversing
- Comfort
- Topical anaesthetic first; many lip fillers also contain lidocaine
- Swelling
- Peaks at 24–48 hours and settles over about a week
- Duration
- Varies with product, volume and metabolism; maintenance is planned at review
- Lip flip
- A micro-dose of BTX that rolls the upper lip outward slightly; it adds no volume
Lip fillers in Singapore are hyaluronic acid gels placed by a doctor to define the border, add height to the lip body, or support the philtrum and corners. Each goal calls for a gel of a different firmness, and none of them shortens a long upper lip. Dr Sin Yong plans proportion first, places small amounts with fine needles, and reviews the settled shape.
What Is Lip Filler?
Lip filler involves the injection of hyaluronic acid (HA) gel into one or more parts of the lip — the body for volume, the vermilion border for definition, the cupid's bow for shape, and the Glogau-Klein points for projection. HA is reversible (dissolvable with hyaluronidase) and tailorable to specific lip architecture.
What migrated lip filler looks like, and why it moves, is covered in the guide to the signs of filler migration.
Lip fillers in Singapore: what each part of the lip needs
Lip fillers in Singapore are hyaluronic acid gels placed in specific parts of the lip, not spread through the lip as a whole. The border, the body, the Cupid's bow and the corners each change something different. A good plan names which of these has changed, then chooses a gel of the right firmness for that job. Because the gel can be dissolved with hyaluronidase, the plan can be adjusted later.
| Area treated | What filler does there | Suits | Not for |
|---|---|---|---|
| Vermilion border | Redefines the edge where the pink lip meets the skin, much like a fine outline | A border that has blurred or flattened with age | A border that is already crisp, where more product can look ridged or outlined |
| Lip body | Adds fullness and projection to the pink part of the lip | Thin or deflated lips, or one lip out of proportion with the other | Lips already in proportion with the chin, teeth and mid-face |
| Cupid's bow and philtral columns | Restores the double curve at the centre of the upper lip and the ridges above it | A bow or columns that have softened over time | Shortening a long upper lip, which filler cannot do |
| Corners of the mouth | Supports corners that have started to turn down at rest | Downturned corners caused by lost local support | Deep folds that come from the cheek and jaw, which need a wider plan |
Lip filler candidates: who it suits and who should wait
- Suits: adults who want a proportionate change and accept that a subtle result is the aim.
- Suits: naturally thin lips, lips that have deflated with age, mild asymmetry or a border that has lost definition.
- Wait: pregnancy, breastfeeding, an active cold sore, or infection or broken skin around the mouth.
- Discuss first: a known allergy to hyaluronic acid products or lidocaine, or a history of severe allergic reactions.
- Discuss first: a bleeding tendency or blood-thinning treatment, recent dental work, or filler of unknown type already in the lips.
- Not for: a request to copy a filter or someone else's lips.
Rekindling the Lips: Dr Sin Yong's planning sequence
Dr Sin Yong's lip approach, Rekindling the Lips, starts with proportion rather than a volume. He reads the lips against the whole lower face, including how much tooth shows and how far the chin projects. Where lips have thinned with age, old photographs guide the plan, so it returns what was there rather than imposing a new shape. The sequence is border before body, then support at the corners and philtrum, aiming for projection rather than inflation. He places hyaluronic acid with fine needles at planned points in small amounts, moulds the lip straight afterwards and reviews it with you. The settled shape is checked again once swelling has gone down, and anything further is added then.
What decides the lip plan
- Which parts of the lip have changed: border, body, bow, corners or a mix.
- How firm the gel needs to be, since border definition, body volume and hydration call for different products.
- The amount, which follows the proportion assessment rather than a preset volume.
- Whether earlier filler has migrated or built up and needs dissolving or correcting first.
- Whether a conservative first treatment and a second, staged visit will give a more even result.
- Cold sore history, allergies and medicines, which change the preparation.
For how lip filler fits with other filler areas, see dermal fillers in Singapore.
Lip filler Singapore: shape goals, and which gel fits each
Lip filler in Singapore is planned around a shape goal, not a syringe. Border definition, vertical height, the philtrum, the corners and hydration-only treatment each ask something different of the gel, so the firmness of the hyaluronic acid is chosen for the job. A firm, cohesive gel holds an edge; a soft gel spreads and lifts the body of the lip; a very soft, lightly cross-linked gel sits near the surface and holds water. The table sets the five goals side by side with what each one cannot do, which is the part most people are not told.
| Shape goal | Hyaluronic acid gel type | What the filler does there | What it does not do |
|---|---|---|---|
| Border definition | A firmer, cohesive gel placed along the vermilion border in small amounts | Sharpens the edge where pink lip meets skin and lifts a flattened white roll | Does not add fullness; a heavy hand here reads as a ridge or an outline |
| Vertical height | A soft to medium gel placed in the body of the lip | Adds height and projection to the pink part of the lip, upper or lower, to balance the two | Does not shorten a long upper lip or change how much tooth shows; more height can make a long lip look longer |
| Philtrum and Cupid's bow | A firmer gel in tiny amounts at the philtral columns and the peaks of the bow | Restores the double curve and the two ridges above it that soften with age | Does not lift the whole upper lip; filler cannot move the lip upward, which is a different question |
| Corners of the mouth | A medium gel placed as support beneath the corners | Props up corners that have begun to turn down at rest | Does not treat deep folds that come from the cheek and jaw; those need a wider plan |
| Hydration-only | A very soft, lightly cross-linked gel spread thinly through the lip | Improves surface texture and lines in a lip that is not thin | Does not add visible height or definition; it is the wrong product for a thin lip |
Two rules follow from the table. First, one gel rarely serves two goals, so a lip that needs both border and height is usually treated with two products or in two stages. Second, every row is hyaluronic acid, so a result that is wrong in shape can be dissolved with hyaluronidase and replanned; the filler correction page explains how that is done. What the filler cannot do is settled before anything is placed. A long upper lip, a gummy smile, or lips that disappear on smiling are muscle or skeletal questions, and the lip flip section below explains the alternative.
Dr Sin Yong's own sequence, Rekindling the Lips, follows this order: border before body, then support at the corners and philtrum, with small amounts moulded at the time and reviewed once swelling has settled. Where lip filler is one part of a wider plan, the dermal fillers page shows how the lips sit with the chin and mid-face.
Lip augmentation in Singapore: doctor, not therapist
Lip augmentation in Singapore is a medical procedure. Lip injections place a hyaluronic acid filler, which the Health Sciences Authority regulates as a medical device, into tissue that carries the labial arteries, so injecting it is the practice of medicine and is reserved for doctors registered with the Singapore Medical Council. A beauty salon, spa or therapist is not permitted to inject, whatever the product is called. Aesthetic procedures by doctors are governed by the SMC Guidelines on Aesthetic Practices for Doctors, and the clinic itself is licensed under the Healthcare Services Act. The regulation of aesthetic medicine in Singapore page sets out each rule and how to check it.
Why the rule matters for the lips specifically: the superior and inferior labial arteries run through the lip close to where filler is placed. Filler that enters an artery can block it, and the response has to be immediate, with hyaluronidase on hand and a doctor who recognises the signs. That is the practical reason a Singapore lip augmentation doctor, rather than a therapist, performs lip injections, and why an assessment comes before the appointment rather than being folded into it.
What to ask before booking lip injections in Singapore:
- Is the person injecting a doctor on the Singapore Medical Council register, and is that doctor the one who will assess you?
- Which filler is used, and is it registered with the Health Sciences Authority? The name should be given plainly.
- Is hyaluronidase kept in the clinic, and has the doctor used it?
- Will the settled shape be reviewed, and by whom?
Dr Sin Yong assesses and injects every lip himself on Orchard Road, Singapore, using hyaluronic acid fillers registered with the Health Sciences Authority and placed with fine needles in small amounts. Filler done elsewhere that has migrated or lumped is assessed first, and where needed is dissolved before anything new is planned; the filler correction page explains that process. The same framework covers the rest of the face, which is why lip augmentation here is planned against the chin, the teeth and the mid-face rather than on its own.
Natural vs. Overdone — The Difference
Natural results maintain the natural upper-to-lower lip ratio, respect the vermilion border, preserve the cupid's bow and do not overfill. Overdone results typically occur when too much volume is placed, filler is placed in the wrong planes, or volume has accumulated over multiple sessions. Dr Sin Yong's philosophy: proportion first, restraint always.
“Natural results maintain the natural upper-to-lower lip ratio, respect the vermilion border, preserve the cupid's bow and do not overfill.”
Dr Sin YongOn natural-looking lip filler
How Long Does Lip Filler Last?
Commonly several months to about a year, varying with metabolism, product and volume injected. Lips are one of the most mobile areas; filler metabolises faster here than elsewhere. Maintenance is planned at review rather than on a fixed calendar.
The Procedure — What to Expect
Topical numbing cream is applied 20–30 minutes before. Many HA lip augmentations contain lidocaine for additional comfort. Procedure takes approximately 30 minutes. Swelling peaks at 24–48 hours and resolves within a week; the settled shape is reviewed once swelling has resolved.
Lip fillers Singapore price: what decides the fee
The price of lip fillers in Singapore follows the gel chosen, the amount your proportions call for, any dissolving or correction of earlier filler and the review after a conservative first treatment, which is why a per-syringe figure from one clinic is not a like-for-like comparison with another clinic’s plan. The factors shared by every filler area are on dermal filler cost factors, and the fee is set out in writing after assessment, as how fees are quoted explains.
Choosing a Provider
The lip is technically demanding. Key considerations: Is the injector a licensed doctor with training in facial anatomy? Do their results look natural? Are they willing to use restraint? Can they dissolve filler if needed? Dr Sin Yong performs lip enhancement on Orchard Road.
Key takeaways
- Lip filler is hyaluronic acid gel placed in specific parts of the lip, the border, the body, the Cupid's bow or the corners, and each part changes something different.
- The firmness of the gel is chosen for the goal, and one gel rarely serves two goals, so a lip that needs both definition and height is usually treated with two products or in two stages.
- Filler cannot shorten a long upper lip, change how much tooth shows or correct a gummy smile; those are muscle or skeletal questions.
- Because the lip fillers used are hyaluronic acid, a shape that is wrong can be dissolved with hyaluronidase and replanned.
- Injecting the lips is the practice of medicine in Singapore, reserved for doctors registered with the Singapore Medical Council, because the labial arteries run close to where filler is placed.
- Pregnancy, breastfeeding, an active cold sore or broken skin around the mouth mean waiting, and the settled shape is reviewed once swelling has gone down.
Ready to Book a Consultation?
All treatments performed personally by Dr Sin Yong on Orchard Road, Singapore.
WhatsApp +65 8023 7170Lip filler or lip flip: what is the difference?
Lip filler adds material; a lip flip adds none. That single distinction decides which one fits.
Lip filler places hyaluronic acid gel in the lip body, border and Cupid's bow. It changes volume, shape and definition, and because it is gel it can be moulded at the time and dissolved later with hyaluronidase.
A lip flip is a small dose of botulinum toxin (BTX) placed into the orbicularis oris, the ring of muscle around the mouth. As the upper part of the muscle relaxes, a little more of the pink upper lip rolls outward, which is most noticeable when smiling. A 2025 systematic review describes it as a technique for subtle eversion without added volume, with transient effects such as difficulty using a straw or whistling.
The two answer different problems. A lip that is genuinely thin or has lost its border needs structure, which BTX cannot provide. An upper lip of reasonable volume that disappears on smiling may be better served by relaxation than by more product. Some plans use both, sequenced. Because the muscle around the mouth also speaks, eats and drinks, BTX here is dosed conservatively, and suitability is decided at assessment.
What can go wrong with lip filler, and how is it managed?
Most effects after lip filler are expected and short-lived: swelling, tenderness and bruising that settle over days. The less common problems are the reason the lip is treated in a medical setting.
Lumps can form when gel collects in one spot; many soften with moulding, and persistent ones can be dissolved. Migration — filler drifting above the border into the upper lip skin — tends to follow repeated volume over time or placement in the wrong plane, and is managed by dissolving and replanning rather than adding more. Cold sores can be triggered in people prone to them, which is why that history is asked about beforehand.
The serious complication is vascular occlusion, where filler compresses or enters a blood vessel. The lip has a rich arterial supply, so the signs — unusual pain, blanching or a dusky, mottled colour — are watched for during and after treatment. Hyaluronidase is kept on hand because it breaks down HA gel, and published guidelines set out how it is used urgently in this situation.
Restraint lowers risk as well as improving the look: smaller volumes, the right depth, and a review once swelling has resolved.
Who should not have lip filler?
Lip filler is deferred or avoided in some situations, and the consultation exists partly to find them.
Pregnancy and breastfeeding are reasons to wait. An active cold sore, infection or broken skin on or around the lips means postponing until it has healed. A history of non-resorbable filler in the lips, or filler of unknown type from elsewhere, needs careful assessment first, because injecting into or around it behaves differently.
Certain medical conditions and medications are reviewed, including autoimmune disease, bleeding tendencies and blood-thinning treatment, along with any previous reaction to filler or local anaesthetic. Recent or planned dental work matters too, since procedures in the mouth can introduce bacteria around fresh filler.
Expectations count as much as medical history. A request to match a filter or someone else's lips, or to keep adding volume to lips that are already in proportion, is a reason to pause rather than proceed. Lips are read against the chin, teeth and mid-face; where a recessed chin is making the lips look larger or smaller than they are, that is discussed before any lip plan is made.
Lip fillers in Singapore: what affects the cost?
The cost of lip filler follows the plan rather than a fixed figure, because the plan differs from one pair of lips to the next.
Four things shape it. First, the product: lip fillers differ in how firm or soft the gel is, and the choice depends on whether the aim is border definition, body volume or hydration. Second, the amount used, which follows the assessment of proportion rather than a preset volume. Third, whether existing filler has to be dissolved or corrected first — migrated or excess product is addressed before new work is added. Fourth, whether the plan is staged, with a conservative first treatment and a review once swelling has settled.
A figure quoted before anyone has looked at your lips cannot reflect any of these. Cost is set out clearly at consultation, before anything is agreed, and a decision not to treat — or to do less than was asked for — is always an acceptable outcome of that conversation.
| Option | What it does | What it cannot do | Typical recovery | Who it tends to suit |
|---|---|---|---|---|
| Hyaluronic acid lip filler | Adds volume, defines the vermilion border and Cupid's bow, and supports the corners; adjustable and dissolvable with hyaluronidase | Shorten a long upper lip, or erase deeply etched lines above the lip on its own | Swelling and possible bruising that peak at 24–48 hours and settle over about a week | Thin, asymmetric or age-deflated lips, or borders that have lost definition |
| Lip flip (micro-dosed BTX to the upper lip muscle) | Relaxes part of the orbicularis oris so a little more of the upper lip rolls outward, especially when smiling | Add volume, define the border or change the lower lip; the effect is subtle and shorter-lived than filler | Little to see afterwards; drinking through a straw or whistling can feel different for a few weeks | An upper lip that thins or disappears on smiling, where a small change without added volume is wanted |
| Ultra-fine HA or skin booster for lip texture | Improves hydration and surface smoothness of the lip with little visible change in volume | Add shape, projection or border definition | Mild swelling or small bruises that settle | Dry, finely lined lips that already have adequate volume |
| Fractional CO2 resurfacing for lines above the lip | Rebuilds dermal collagen where vertical lines have etched into the upper lip skin | Add volume to the lip itself | Redness, crusting and peeling that settle; the length depends on the settings used | Etched vertical lines above the lip, often planned alongside lip filler |
| Surgical lip lift — referred to a plastic surgery specialist | Removes a strip of skin beneath the nose to shorten the upper lip and show more of the vermilion | Add volume, and it leaves a scar under the nose | Surgical recovery with swelling and sutures, guided by the operating team | A long upper lip that covers the teeth at rest, where filler would add weight rather than shape |
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- Effectiveness and safety of hyaluronic acid fillers used to enhance overall lip fullness: A systematic review of clinical studies — Journal of Cosmetic Dermatology (Stojanovič L, Majdič N), 2019.
- Guideline for the Safe Use of Hyaluronidase in Aesthetic Medicine, Including Modified High-dose Protocol — Journal of Clinical and Aesthetic Dermatology (Murray G et al.), 2021.
- The lip flip: a systematic review of botulinum toxin lip augmentation — Archives of Dermatological Research (Pitchford CA et al.), 2025.
- Different Techniques and Quantitative Measurements in Upper Lip Lift: A Systematic Review — Aesthetic Plastic Surgery (Zhao H et al.), 2023.
Medically reviewed by Dr Sin Yong · Updated 20 October 2026
How Dr Sin Yong approaches lip filler
Dr Sin Yong's lip approach, Rekindling the Lips, starts with proportion mapping rather than a volume. The lips are assessed against the whole lower face, including tooth show and chin projection, and where lips have thinned with age, old photographs are used so the plan returns structures that existed rather than imposing a new shape.
The sequence is border definition before body, support at the corners and philtrum, and projection rather than inflation. Hyaluronic acid filler is placed with fine needles at planned points along the border, body, Cupid's bow and corners, in small aliquots. He moulds the lip immediately after injection, reviews it with the patient and makes minor adjustments in the same session where needed; the settled shape is reviewed again once swelling has resolved.
Lip shapes and proportions: what a doctor looks at
Lips vary widely in shape, and much of that variation is normal anatomy rather than something to correct. Words such as full, thin, wide, heart-shaped, round, top-heavy or bottom-heavy are everyday ways of naming that variety; at assessment a doctor looks instead at the structures that create it.
The first is the ratio of upper to lower lip. Published measurements in several populations find the lower lip somewhat fuller than the upper, but the figures differ with ethnicity, age and sex, so the ratio is read as a reference point for one face, not a target. The second is the vermilion border, the edge where the pink lip meets the skin, together with the white roll just above it, which decides how defined the outline reads. The third is the Cupid's bow, the double curve at the centre of the upper lip, and the philtrum above it, the groove between the two philtral columns running up to the nose.
These are judged alongside the length of the upper lip, how much tooth shows at rest and when smiling, symmetry between the two sides, and the chin, teeth and mid-face around them. That is why two people asking for the same lip shape can need different plans, or none.
Frequently Asked Questions
Check that the person injecting is a doctor on the Singapore Medical Council register and that the same doctor assesses you. Ask which hyaluronic acid filler is used and whether it is registered with the Health Sciences Authority, whether hyaluronidase is kept in the clinic, and who reviews the settled shape. Dr Sin Yong holds MBBS (NUS), MRCS (Edinburgh), MSc Aesthetic Medicine (University of London) and MSc Practical Dermatology (Cardiff).
Usually, yes. Lip injections most often means hyaluronic acid lip filler placed by a doctor. The other injection sometimes offered for the lips is a small dose of botulinum toxin into the muscle around the mouth, called a lip flip, which adds no volume. Which one fits depends on whether the lip is thin or simply disappears on smiling, and that is decided at assessment.
A doctor registered with the Singapore Medical Council. Lip filler is a medical device regulated by the Health Sciences Authority, and injecting it is the practice of medicine, so a beautician, spa or therapist is not permitted to do it. Aesthetic procedures by doctors follow the SMC Guidelines on Aesthetic Practices, and the clinic is licensed under the Healthcare Services Act.
No. Filler adds material; it cannot shorten the distance from the nose to the lip edge, and adding height to a long upper lip can make it read as longer. A long or hidden upper lip is assessed as a muscle or skeletal question, and a lip flip or no treatment may be the better answer. Border definition in small amounts is sometimes considered instead.
It depends on the lips and the goal. A first treatment is often kept deliberately conservative, and the settled shape is reviewed once swelling has gone down. If more is needed, it is added at a second visit, which tends to give a more even result than placing a large amount at once. Lips that already have filler from elsewhere may need correcting before anything new is added.
Tell the doctor before anything is planned. Many lip fillers contain lidocaine, so a known allergy to it, or to hyaluronic acid products, changes which product can be used or whether filler is suitable at all. A history of severe allergic reactions is also discussed at consultation. The numbing method and the product are then chosen around your history rather than by default.
Uncommonly, yes. Most lumps show early, when gel has collected in one spot, and many soften with moulding. A lump that appears later can be inflammatory and should be examined rather than massaged at home. Because lip filler is hyaluronic acid, problem product can usually be dissolved with hyaluronidase. Any new lump, redness, warmth or pain in treated lips is a reason for review.
Both are used for lips in Singapore. Dr Sin Yong places hyaluronic acid with fine needles at planned points along the border, body, Cupid’s bow and corners, in small amounts, then moulds the lip and reviews it with you before you leave. Numbing cream is applied first, and many lip fillers also contain lidocaine, so most people describe pressure and stinging rather than sharp pain.
Natural lip results require a specifically formulated lip filler, correct volumes (less is better for first-time patients), and attention to lip anatomy — Cupid's bow, philtrum columns and vermilion border, not just overall volume.
It varies with the product, the volume placed and individual metabolism. Lips are a high-movement zone and metabolise filler faster than static areas.
Topical anaesthetic cream applied 20–30 minutes before the procedure significantly reduces discomfort. Tolerance varies, and comfort is checked throughout.
Yes — HA lip fillers can be dissolved with hyaluronidase, which starts breaking the gel down soon after injection; more than one treatment is sometimes needed. This reversibility is one reason HA is generally preferred for the lips.
Migration — filler drifting beyond the border into the upper lip skin — is uncommon with conservative volumes placed in the correct plane. It tends to follow large or repeated volumes over time. Where it has happened, the usual answer is to dissolve with hyaluronidase and replan rather than add more.
Common advice is to keep make-up off the lips for the rest of the day and to avoid strenuous exercise, heat such as saunas, and alcohol for about a day, as these can increase swelling and bruising. Specific aftercare is given on the day.
A lip flip is shorter-lived than lip filler because the dose of BTX is small and the muscle around the mouth is in constant use. Filler lasts longer because the gel itself provides the shape. Both vary between individuals, and plans are reviewed rather than fixed to a calendar.
Partly. Where lost lip volume is folding the skin above it, restoring support can soften shallow lines. Lines that have etched into the skin usually need the skin itself treated as well, for example with resurfacing, and conservative BTX where the muscle is over-active.
If medically appropriate, avoiding alcohol and supplements that increase bruising, such as fish oil or vitamin E, in the days beforehand can help. Prescribed medication should never be stopped without your own doctor's advice. Mention any history of cold sores, as this changes the preparation.
Previous filler is examined first. If it has migrated, become lumpy or built up over time, dissolving or correcting it may come before any new product is placed. Knowing the type of filler used before helps, especially if there is any chance it was non-resorbable.
The Cupid's bow is the double curve at the centre of the upper lip border, formed where the two philtral columns meet the lip. Its shape varies naturally between people, and it is one of the features assessed, and preserved, when lip filler is planned.
Yes. Some difference between the two sides in volume, height or curve is common, and it often shows more when talking or smiling. Where asymmetry is a concern, it is assessed at rest and in movement to decide whether filler is the right tool or whether the difference comes from the teeth, jaw or muscle.
Yes. Common combinations are an anti-wrinkle lip flip for a lip that rolls in on smiling, treatment of the fine lines around the mouth, and chin filler where a recessed chin makes the lips look too prominent. They are planned in sequence after the whole lower face has been assessed.
By knowing where the lip arteries run, injecting slowly in small amounts, using the right depth, and choosing a cannula where it suits. Hyaluronidase is kept on hand, and Dr Sin Yong watches the skin colour throughout. Pain that is getting worse, or skin that turns pale, dusky or mottled, needs same-day review.
No. Treatment for appearance is not claimable under MediSave or MediShield Life, and most private insurance plans exclude it. If you have a question about your own policy, check with your insurer before booking.