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Aesthetics
Shoulder slimming uses botulinum toxin in the upper trapezius where a bulky, high shoulder line is muscular. It is assessed and injected by an SMC-registered doctor.
Quick answer
Botulinum toxin placed in the upper trapezius softens the slope of the shoulder line over weeks where the bulk is muscular. It is not a treatment for posture, and if you train or lift heavily the effect on strength is discussed first.
Verified by Dr. Anthony Stanislaus, MBBS, PBM, Cert. Men's Health · Last reviewed 13 August 2026 · Next review 13 February 2027
Medically reviewed by Dr. Anthony Stanislaus, MBBS, PBM, Cert. Men's Health
Last reviewed 13 August 2026 · Next review 13 February 2027
The upper trapezius runs from the neck to the shoulder. Where it is bulky, the neck can look short and the shoulder line high, and reducing its activity softens that slope over weeks.
This is a functional muscle. If you lift, carry or train, reducing its activity has consequences, and that conversation happens before treatment rather than after.
Assessment first: your doctor examines the upper trapezius at rest and under load, to judge bulk, symmetry and how much work the muscle does for you.
Injection points are marked along the muscle belly between the neck and the tip of the shoulder.
Injections are placed into the trapezius. The dose is larger than a facial dose because the muscle is larger; session length is set by your doctor at consultation.
The shoulder line softens and the neck looks longer as bulk reduces. Strength under load can soften with it, which is the trade-off to weigh before treatment. Results vary between individuals and cannot be guaranteed.
How quickly botulinum toxin acts, and why a review is booked before any further dose, are covered on the anti-wrinkle injections page.
Pinpoint marks and occasional bruising. Aching across the shoulder for a day or two is common, and lifting or carrying can feel weaker for a period. Report any weakness that interferes with daily activity.
The general aftercare for any toxin treatment, including the twenty-four hour restrictions, is set out on the anti-wrinkle injections page.
The effect wears off, so this is repeated treatment. Interval and dose are set at review against how much load the muscle actually carries for you.
What moves the cost of shoulder slimming is the dose the trapezius needs, which is larger than a facial dose, and whether both sides are treated.
Botulinum toxin is a prescription-only medicine and is described here in generic terms rather than by brand. The product used and its batch number are recorded in your notes at the time of treatment.
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In line with the advertising rules for licensed clinics in Singapore, we do not publish before-and-after photographs or patient testimonials that imply a specific outcome. Results vary between individuals and cannot be guaranteed. Your doctor will set realistic expectations for your situation at your consultation.
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