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Trapezius Slimming - using muscle relaxant injections

Trapezius slimming injections, discussed by Dr Cindy Wang

What is the trapezius muscle?

The trapezius muscle, resembling a trapezoid in shape, is a sizeable muscle located in the upper back. It originates at the base of the neck and stretches across the shoulders to the middle of the back. This versatile muscle facilitates movement in the head, neck, arms, shoulders, and torso, while also providing stability to the spine and aiding posture.

Why treat the trapezius using botulinum toxin?

Excessive use of the trapezius muscle, even at low intensity, can lead to overactivity due to repetitive motions without sufficient rest. This overactivity often results in tension, tightness, stress, or irritation.

Trapezius slimming treatment with muscle relaxant injections (using botulinum toxin) offers relief from such issues. It can reduce bulk in the area, enhance posture, and even feminise the upper back, neck, and shoulder region, addressing the appearance of overdeveloped muscles in these areas.

The trapezius, spanning the upper back, neck, and shoulders, can be effectively managed through muscle relaxant injections, most typically utilising botulinum toxin injections by a registered cosmetic practitioner. This trapezius slimming treatment, sometimes known as ‘TrapTox,’ aims to shrink the trapezius muscle, creating a longer neck and a more angular shoulder appearance. It may also alleviate neck and shoulder pain caused by overuse or hypertrophy, improving overall posture by addressing the appearance of hunching.

Key benefits

  • Improved aesthetics: Trapezius slimming injections with botulinum toxin can reduce muscle bulk in the upper back, neck, and shoulders, leading to a more sculpted and defined appearance.
  • Enhanced posture: By addressing over-developed trapezius muscles, this muscle relaxant injectable treatment can help individuals achieve improved posture and reduce the appearance of hunching or rounded shoulders.
  • Pain relief: Trapezius slimming injections can alleviate neck and shoulder pain caused by overactive or hypertrophied trapezius muscles, improving comfort and mobility.
  • Feminisation: This muscle relaxant treatment to the traps can be used to feminise the upper back area, creating a softer and more elegant or delicate appearance in individuals seeking a more feminine silhouette.
  • Non-surgical: Trapezius slimming using a botulinum toxin injectable is a non-invasive procedure, with minimal downtime.
  • Temporary effects: The results are temporary, allowing for adjustments and re-treatment over time as needed to maintain the desired appearance and comfort.
  • Minimal discomfort: Patients typically experience minimal discomfort during the procedure, making it a relatively tolerable treatment option.
  • Repeatable: Additional treatments can be administered as needed to maintain the desired debulking effect.
  • Cosmetic Doctor administration: Treatment should be administered by a registered cosmetic practitioner like the Cosmetic Doctors at Pavilion Cosmetic Medicine, with broad experience in muscle relaxant injections for optimal safety and effectiveness.


  • Muscle relaxation: Trapezoid slimming using botulinum toxin injections relax the trapezius muscle fibers, reducing their activity.
  • Decreased muscle size: This relaxation causes the trapezius muscle to temporarily shrink or “debulk.”
  • Reduced muscle tension: The relaxed muscle is less tense, leading to a softer, less bulky appearance.
  • Aesthetic improvement: Debulking enhances the visual appearance of the upper back, neck, and shoulders.
  • Feminising outcomes: Some women seek treatment as their muscular traps may make them look stocky, as their neck appears shorter, and this may be considered unflattering or less feminine.
  • Restoring a youthful appearance: Bulky traps area often associated with an older looking appearance, with their posture is becoming hunched-over.
Treatment Details

What to expect

What happens after my Cosmetic Doctor consultation?

Following your consultation with one of our Cosmetic Doctors, a few tiny injections are made just under your skin, reducing nerve stimulation to the targeted muscles.

The procedure itself usually takes about 10 minutes, but this can vary depending on the number of areas being treated. Because men tend to have larger and stronger muscles, they often require more injections to achieve the desired results.

We strive to make your injectable experience with us as comfortable as possible. The area to be treated is typically numbed with ice beforehand. Topical anaesthetic is not usually required as the needles are very fine and only a small volume of the product is needed, making the procedure virtually painless. For patients concerned with discomfort, topical anaesthetic is available along with happy gas (entonox).

In the hands of one of our skilled and experienced Cosmetic Doctor practitioners, muscle relaxant injectables have an excellent safety record and high patient satisfaction.

Your Questions Answered

Frequently asked questions (FAQs)

What is Trapezius slimming treatment?

Trapezius slimming treatment uses muscle relaxant injectables administered by a registered cosmetic practitioner.

It aims to reduce the bulkiness of neck and shoulder muscles, creating a slimmer and more elegant appearance.

Muscle relaxant injections are quickly and effectively administered, with the objective of shrinking overdeveloped trapezius muscles, resulting in a more contoured neck and shoulder area while relieving muscle tension.

Can you contour the shoulders with trapezius muscle relaxant injections?

Yes, trapezius muscle relaxant injections using botulinum toxin, can be used to slim and define bulky shoulder muscles.

This treatment reduces tension in the neck and shoulder area, leading to a slimmer and more feminine look.

Why treat the trapezius muscle?

Trapezius muscle treatment can alleviate tension and improve aesthetics.

Enlarged or hypertrophic trapezius muscles can create a bulkier, more masculine appearance in the shoulder area.

Treating these muscles with muscle relaxant botulinum toxin injections may also lengthen the neck and create a more balanced facial profile.

How does trapezius slimming injection treatment work?

Trapezius muscle relaxant injections visually improve and contour shoulder and collarbone muscles.

The injections relax the muscles for approximately three months, resulting in a slimmer and more elegant neckline.

Multiple sessions can provide longer-lasting effects.

How long does trapezius slimming treatment last for?

Results typically last between 3-6 months, depending on individual factors and lifestyle.

Metabolism and daily habits influence treatment longevity. Maintenance treatments are recommended for prolonged results.

Who is a suitable candidate for trapezius slimming injections?

People experiencing shoulder and neck tension, posture issues, or desiring a more refined shoulder profile are suitable candidates.

Who is not a suitable candidate for trapezius slimming injectables?

Pregnant or breastfeeding women, recent recipients of similar injections, those with neck or shoulder injuries, and individuals with allergies to botulinum toxin are not suitable candidates.

Are there any side effects with trapezius slimming injections using botulinum toxin?

Possible side effects include bruising, discomfort, and temporary muscle weakness in the trapezius area.

These side effects are generally minor when administered by a registered cosmetic practitioner.

Can muscle relaxant injectables reduce the size of the trapezius muscle?

Yes, muscle relaxant injectables can help relieve excessive muscle contraction and tension in the trapezius, resulting in a more balanced upper body appearance.

Does muscle relaxant injections to the trapezius work?

Muscle relaxant injections to the trapezius muscle cause relaxation and slimming over time.

This treatment achieves a more elongated and refined neck and shoulder area.

Will using muscle relaxants in the traps slim my neck?

Muscle relaxant injections to the trapezius, sometimes called ‘TrapTox,’ can alleviate neck and shoulder tension, creating a slimmer and more elegant neck appearance.

How long will it take for trapezius muscle relaxant injections to work?

It may take 1-2 months to see full cosmetic results, but reduced tension should be noticeable within 1-2 weeks. Ongoing treatments may be needed for desired outcomes.

Can one exercise after muscle relaxant injectables to the trapezius?

Avoid strenuous exercise, including weight lifting or heavy weight bearing, for 24 hours after trapezius muscle relaxant injections to ensure effectiveness.

How much does trapezius slimming injections cost?

Pricing depends on the product type and number of units of botulinum toxin used during the treatment session.

Patients can expect to pay between $1,000 and $3,000; however, pricing varies, so consultation with a Cosmetic Doctor at Pavilion Cosmetic Medicine is a good starting point to develop a personalised treatment plan.


Interested in TrapTox Injections for Trapezius Slimming by Cosmetic Doctor?

We welcome you to Pavilion Cosmetic Medicine in Crows Nest, Sydney for a consultation with our Cosmetic Doctors, who'll tailor a treatment plan specific to your concerns and desires.

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