Medical Treatments · Fillers & Injectables · IN Eternity Clinic
Wrinkle-Relaxing Injections in Singapore
Small, precise doses of a neuromodulator soften the muscle movement that folds the skin into frown lines, forehead lines and crow's feet. The aim is a rested face that still moves like yours.
Written & medically reviewed by Dr Sin Yong · 8 October 2026
Quick answer
- Small, precise doses of a neuromodulator soften the muscle movement that folds the skin into frown lines, forehead lines and crow's feet. The aim is a rested face that still moves like yours.
- Used for: Droopy Eyelids, Under-Eye Lines & Crepey Skin, Fine Lines & Wrinkles.
- Performed by: Dr Sin Yong at IN Eternity Clinic, 9 Scotts Road, Pacific Plaza (beside Orchard MRT).
- Enquire: SkinRev Lab, CityLink Mall (City Hall MRT) passes enquiries to the clinic, or contact IN Eternity Clinic directly on +65 8815 3008.
- Suitability, number of sessions and pricing are decided at consultation; individual results vary.
Wrinkle-relaxing injections, often called anti-wrinkle injections, use a neuromodulator to reduce the activity of specific facial muscles. If you are looking into wrinkle-relaxing injections in Singapore, they are a prescription medical treatment and are performed by Dr Sin Yong at IN Eternity Clinic after an assessment of how your face moves. They are used mainly for the lines that appear with expression: the frown lines between the brows, horizontal forehead lines and crow's feet at the outer corners of the eyes.
These are called dynamic lines, because they come from repeated muscle movement folding the skin in the same place. Over years, they can become etched into the skin and stay visible even at rest. Relaxing the muscle softens dynamic lines and, with regular treatment, can stop them deepening. Lines that are already etched usually soften only partly and may need other treatments as well. The effect is gradual over days, temporary, and depends a great deal on dosing and placement.
How it works
The mechanism,
in plain English
Facial muscles contract when nerves release acetylcholine at the junction between nerve and muscle. A neuromodulator temporarily blocks that release in the small area where it is injected, so the muscle contracts less strongly. The skin above it is folded less, and the line it creates softens. Nearby muscles that are not injected keep working, which is how a natural range of expression is preserved.
The effect usually starts within a few days and builds to its full level over about two weeks. Over the following months, the nerve endings form new connections and muscle activity gradually returns, so treatment is repeated if you want to maintain the effect. Many people find their lines are less deep over time, because the skin is creased less often.
Modern practice favours neuromodulation rather than freezing: lower doses spread thoughtfully, matched to the strength of each muscle and to how it interacts with its neighbours. For example, the forehead muscle lifts the brows, so over-treating it can make the brows and upper lids feel heavier. Careful assessment of brow position before injecting helps avoid that.
“Relaxing a muscle softens a line made by movement; it cannot fill a deep fold or erase a line that is etched in at rest.”
— Dr Sin Yong, IN Eternity Clinic
- Energy / product
- Prescription neuromodulator (wrinkle-relaxing injection)
- Target layer
- Specific facial muscles of expression, e.g. frown, forehead and crow's-feet muscles
- Typical session
- About 10–20 minutes, including assessment
- Downtime
- Usually minimal — small bumps for 15–30 minutes; occasional pinpoint bruising
- Performed by
- Dr Sin Yong, IN Eternity Clinic
Is it right for you
Who it suits,
and who it does not
Wrinkle-relaxing injections usually suit adults with lines that appear or deepen when they frown, raise their brows or smile, such as frown lines, forehead lines and crow's feet. They suit people who want to look less tired or stern while keeping natural movement, and those in their late twenties and thirties who want to slow down the deepening of expression lines. They are also often part of a wider plan, where relaxing the muscles is combined with skin boosters, lasers or fillers that address skin quality and etched lines.
Wrinkle-relaxing injections are not suitable during pregnancy or breastfeeding, for people with neuromuscular conditions such as myasthenia gravis, with infection at the injection sites, or with a known allergy to the product. Tell the doctor about medicines that can interact, such as certain antibiotics, and about previous eyelid surgery or eye conditions. If your upper lids are heavy or your brows sit low, forehead treatment needs extra care, as it may make heaviness worse. Deep lines present at rest, volume loss and sagging respond better to other treatments, and wrinkle-relaxing injections alone will not meet those expectations.
Non-invasive alternative at SkinRev Lab
SKINTIGHT® — SKINTIGHT® at SkinRev Lab uses Alma PrimeX microplasma and UltraWave to resurface and tighten the surface layer of the skin, priced at S$588, with no injections and no doctor. It can improve fine, crepey lines and skin texture. It does not relax muscles, so it will not soften frown lines or crow's feet that are driven by movement — the two can complement each other rather than replace each other. Read more
What to expect
Consultation, session
and aftercare
Your first visit at IN Eternity Clinic is a consultation with Dr Sin Yong. He watches how your face moves when you frown, raise your brows, squint and smile, checks brow and eyelid position, and asks about previous treatments. He explains what will soften, what will not and how much movement to expect afterwards. Photographs are taken at rest and in motion for comparison. A course is usually planned at consultation, with a review about two weeks after the first treatment.
The injections take a few minutes. A very fine needle places small amounts into each target muscle; most people feel brief pricks. Small bumps at the injection points usually flatten within 15 to 30 minutes, and occasional pinpoint bruises can be covered with make-up. For the rest of the day, avoid rubbing or massaging the treated areas, lying flat for a few hours, saunas and strenuous exercise. The effect appears over a few days and is reviewed at about two weeks.
Where this happens
Assessment and non-invasive care — SkinRev Lab, CityLink Mall #B1-28, 1 Raffles Link, Singapore 039393. Underground from City Hall MRT and Esplanade MRT; a short walk from Raffles Place, Marina Bay, Suntec and Bugis. Open daily 11am–8pm.
Medical treatment — IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, Singapore 228210, beside Orchard MRT (three stops from City Hall on the North-South line). Mon–Sat 11am–8pm, closed Sunday. Treatments are performed by Dr Sin Yong. WhatsApp +65 8815 3008.
Enquiries to SkinRev Lab about medical treatments are passed to IN Eternity Clinic, where Dr Sin Yong performs them.
Clinic page: Wrinkle-Relaxing Injections at IN Eternity Clinic ↗
What the research says
The evidence,
with sources
Wrinkle-relaxing injections are among the most studied aesthetic treatments. A meta-analysis of seven randomised, double-blind, placebo-controlled studies with 1,474 people found that a single standard dose was far more effective than placebo at improving frown lines, including their appearance at rest, with no significant difference in adverse events between treatment and placebo groups.
A global consensus of plastic surgeons and dermatologists, published in 2016, recommended an assessment-led, patient-tailored approach: identifying when muscle activity is the main cause, using lower doses in the upper face, and combining treatment with hyaluronic acid filler where volume loss contributes. A narrative review of complications identified brow drop and asymmetry as the commonest unwanted effects of these injections, which is why careful assessment of brow position and accurate placement matter. Results vary between people, and most side effects are temporary.
References
- Guo Y, Lu Y, Liu T, et al. Efficacy and safety of botulinum toxin type A in the treatment of glabellar lines: a meta-analysis of randomized, placebo-controlled, double-blind trials. Plast Reconstr Surg. 2015;136(3):310e-318e.
- Sundaram H, Signorini M, Liew S, et al. Global aesthetics consensus: botulinum toxin type A—evidence-based review, emerging concepts, and consensus recommendations for aesthetic use, including updates on complications. Plast Reconstr Surg. 2016;137(3):518e-529e.
- Kassir M, Gupta M, Galadari H, et al. Complications of botulinum toxin and fillers: a narrative review. J Cosmet Dermatol. 2020;19(3):570-573.
Common questions
Your questions,
answered
How much do wrinkle-relaxing injections in Singapore cost?
Pricing for wrinkle-relaxing injections is given at consultation at IN Eternity Clinic. It depends on which areas are treated — frown lines, forehead, crow's feet or a combination — and on the strength of your muscles, which affects the dose. Dr Sin Yong explains the plan and fees after assessing how your face moves, so you know the cost before any treatment is done.
Will I still be able to move my face?
Yes, if the treatment is planned well. The goal is to soften the movement that creases the skin, not to stop expression. Doses are matched to each muscle, and neighbouring muscles keep working. Some people prefer a lighter result with more movement, others want lines smoothed more fully; Dr Sin Yong discusses this with you and adjusts at the two-week review if needed.
How long do the injections take to work?
Most people notice softening within a few days, with the full effect at about two weeks. The effect then wears off gradually over the following months as muscle activity returns, and treatment is repeated if you want to keep it. How long it holds varies with dose, muscle strength, metabolism and the area treated, so timing is planned individually rather than promised.
Can the injections cause droopy eyelids?
Occasionally, the brow or upper eyelid can feel heavier after treatment, usually because the forehead muscle that lifts the brow has been relaxed too much, or because product has spread to the muscle that lifts the lid. This is temporary. Careful assessment of brow and lid position, conservative dosing near the brows and accurate placement reduce the risk. Contact the clinic if you notice a change.
Is it better to start early to prevent wrinkles?
Relaxing muscles that crease the skin repeatedly can slow the deepening of expression lines, and some people in their late twenties or thirties choose lighter treatment for that reason. It is not essential, and it does not stop ageing. Sunscreen, good skincare and not smoking matter just as much. Dr Sin Yong can advise whether treatment makes sense for your face at this stage.
What can't wrinkle-relaxing injections fix?
They do not fill deep folds, such as the lines from nose to mouth, and they do not lift sagging skin or replace lost volume. Lines that are etched in at rest usually soften only partly. For these, treatments such as skin boosters, lasers, energy-based tightening or filler are often combined with the injections. Dr Sin Yong will explain which concern each treatment addresses.
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