July 5, 2017


Every woman prefers to have that lean, elegant shoulder line, especially when wearing a strapless dress for huge events; e.g weddings. Unfortunately, a lot of women are suffering from overdeveloped trapezius muscles which make their neckline look more masculine than desired.


Trapezius muscles are muscles that supports the shoulders and arms, running vertically from the back of the neck down the spine, as well as extending horizontally across the shoulders. Trapezius muscles are heavily used as they assist in raising and rotating the shoulders. Under hypertrophy conditions, it often creates an effect of a much shorter neck and masculine shoulder line.



Did you know that lean and feminine shoulder lines can easily be achieved by a couple Botulinum Toxin injections? Today IFAAS Faculty, board certificated plastic surgeon Dr Moon Seop Choi shares his injection technique on treating the overdeveloped Trapezius muscles, also known as “Collarbone Injection” in South Korea. 



Overdeveloped Trapezius muscles


Collarbone Botox Injection like every other facial botox procedures, paralyses the muscles of the injected area. This will eventually lower the trapezius muscles to create an effect of a feminine shoulder line and the appearance of a longer neck. The overdeveloped muscles will also subside, allowing the collarbone to resurface and appear more well-defined.



Methods: For botulinum toxin injection on trapezius muscles  


Specifications for botox dosage:

Dosage: 10units per point

Target: Targeted marks in Trapezius muscles in picture

Injection points: 5 points as marked in the picture 

Mixing: 5cc into 100 units (2U/0.1cc)

Needle: 30G, 1 1/2 




Before & After 

Check out the vast difference between the “before” and “after” comparison of a collarbone injection. The neckline appears to be longer and slimmer. 



Potential Complications 

  • Pain/Myalgia 

  • Mild Tenderness 

  • Ecchymosis 

  • Less Scapular elevation strength 

  • Scapular dyskinesis 

  • Subacromial impingement syndrome 


We hope you gained valuable insights on this technique. However, did you know that by injecting botulinum toxin on the following marking points on both the front and back shoulders, you can achieve an even more distinct and defined collarbone, with slender and feminine shoulder line and neckline. 





To learn details of the optimal specifications on botulinum toxin technique/ dose used for those injection points and how to overcome potential complications by registering for 



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