Anti-Wrinkle Injections
Trapezius Slimming in London
From £495A botulinum toxin treatment of the trapezius muscle that slims the shoulders, elongates the neck and relieves neck and shoulder tension.

At a Glance
Trapezius Slimming — The Essentials
- Treatment Time
- 15–30 minutes
- Downtime
- Minimal
- Results Last
- 3–6 months
- Results Visible
- 4–14 days
- Sessions
- Single treatment
- Price From
- £495

About the Treatment
What is Trapezius Slimming?
Trapezius slimming (sometimes called 'trap tox' or 'Barbie tox') places botulinum toxin into the trapezius muscle between the neck and shoulders.
It creates a slimmer shoulder line and a longer-looking neck while easing tension and discomfort by relaxing the muscle. Results develop over about two weeks and are temporary.
Benefits
Why You'll Love It
- Slimmer shoulders and a longer-looking neck
- Relieves stubborn neck and shoulder tension
- Can ease tension-related headaches
- Improves posture and everyday comfort
- Non-surgical, with results over about two weeks
- Doctor-led for safe, precise placement
What to Expect
Your Trapezius Slimming Journey
- 01
Consultation
A thorough one-to-one assessment of your goals, skin and medical history.
- 02
Bespoke Plan
A personalised plan designed and explained by a GDC-registered practitioner.
- 03
Treatment
Your treatment carried out safely and precisely in our private Mayfair clinic.
- 04
Aftercare
Clear aftercare guidance and a follow-up to support your results.
Gallery
Inside the Clinic
A look at our calm, private Mayfair clinic and the trapezius slimming experience.
Results
Before & After
Real client results from our Mayfair clinic. Individual results vary from person to person.



Pricing
Trapezius Slimming Costs
Prices below are a guide. Your exact plan and cost are confirmed at your consultation.
- Trapezius Slimming (Trap Tox)From £495
Questions
Frequently Asked
What is trapezius slimming, or trap tox?
Trapezius slimming, sometimes called trap tox, uses botulinum toxin to relax the trapezius muscles across the tops of the shoulders, which can help soften a bulky muscle line and ease tension. It is popular for both shoulder contouring and relief of muscle tightness.
How long does trapezius slimming last?
Results typically last around three to six months, depending on factors such as your muscle strength, activity levels and how your body responds. Many clients plan maintenance treatments through the year.
How much does trapezius slimming cost?
Prices start from £495 at our Mayfair clinic, with your exact cost confirmed at your consultation. The final cost depends on the amount of product needed for your individual muscles.
Can trap tox help with neck and shoulder tension?
By relaxing the trapezius muscles, many people find the treatment helps ease the tension and tightness they carry across their shoulders and neck. We will assess your symptoms and goals at your consultation.
Does trapezius slimming improve posture or lengthen the neck?
By softening overactive trapezius muscles, some people feel their shoulders sit more relaxed and their neck looks longer, though individual results vary. We will discuss what the treatment can realistically achieve for you at your consultation.
When will I see results?
Any easing of tension can be felt within the first week or two, while the visible slimming effect develops more gradually over several weeks. We are happy to review your progress.
Does trap tox hurt?
The treatment involves several injections into the shoulder muscles and most clients find it very manageable. Please raise any concerns about comfort at your consultation.
Are there any side effects of trapezius slimming?
Side effects are usually mild and temporary and can include slight bruising, swelling or tenderness at the injection sites. We will go through full aftercare guidance with you.
Is there any downtime after trap tox?
There is generally little to no downtime and most people return to their normal routine straight away. We do ask you to follow some simple aftercare advice for the first few hours.
Who is suitable for trapezius slimming?
It suits many people wanting to soften the shoulder line or ease muscle tension, but it is not suitable if you are pregnant or breastfeeding or have certain medical conditions, and it cannot be given to anyone under 18. We will confirm your suitability at your consultation.
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Learn more →Ready to book your trapezius slimming?
Book a consultation with Dr Alexa in Mayfair, or send us a message and we'll be happy to help.
Suitability for any treatment is confirmed during your consultation. Results vary between individuals. This page is for general information and does not constitute medical advice.