Why Shoulder Botox Sometimes Fails — A Medical Analysis Based on the Scapula and Muscle Anatomy2025.12.03
Many patients say:
- “I had shoulder Botox, but my shoulders didn’t go down.”
- “My neck still looks short.”
- “There was no visible change at all.”
The most common reason why shoulder Botox fails is misdiagnosis of the true anatomical cause of shoulder prominence.
Not all elevated or wide shoulders are caused by the trapezius muscle.
Correct diagnosis is the key to successful contouring.
When Shoulder Botox Works Well: Trapezius-Dominant Shoulders
Standard shoulder Botox targets the trapezius muscle, which is responsible for:
- Shoulder elevation (shrugging)
- A short-looking neck
- A bulky neck–shoulder junction
Patients who tend to respond best are those with:
- Vertical shoulder elevation
- A rounded or unclear neck–shoulder border
With proper trapezius Botox:
- Shoulders drop naturally
- The neck appears longer
- The collarbone and shoulder line become softer and more feminine
When the Scapula Is the Problem: Trapezius Botox Alone Is Not Enough
If the scapula itself protrudes upward, the main cause is often the:
- Supraspinatus muscle
- Other deep muscles that elevate the scapula
In these cases, Botox injected into the trapezius alone produces almost no visible improvement, regardless of dosage.
Ultrasound-Guided Supraspinatus Botox at AVAN TOKYO
At AVAN TOKYO GINZA LIPOSUCTION CLINIC, we always perform real-time ultrasound evaluation of shoulder musculature before injection.
Based on this assessment, we determine whether to treat:
- Only the trapezius
- Only the supraspinatus
- Or a combined trapezius + supraspinatus approach
Because the supraspinatus is located deep, blind injection carries risks of nerve and vascular injury.
Therefore, ultrasound-guided injection is essential for both safety and accuracy.
Wide Shoulders Are Often Caused by Fat — Not Muscle
If the shoulder appears wide horizontally, the main cause is usually:
- Axillary fat
- Upper arm root fat
- Posterior upper arm fat
In such cases, Botox is ineffective, regardless of how much is injected.
The correct treatment is:
👉 360-degree full-circumference upper arm liposuction
Correct Treatment Depends on the Root Cause


Incorrect diagnosis = expensive treatment with poor results.
Why “Upper Arm Liposuction + Trapezius Botox” Is the Most Photogenic Combination
- Liposuction → Physically reduces shoulder and arm width
- Botox → Lowers shoulder height
This combination:
- Softens the shoulder contour
- Narrows the shoulder frame
- Creates a smooth, continuous neck–shoulder–arm line
From a body-contouring perspective, it is one of the most effective upper-body shaping protocols for photography and daily appearance.
Conclusion
Shoulder Botox is not a universal solution. Its success depends entirely on:
- Accurate muscle diagnosis
- Proper evaluation of scapular position
- Precise assessment of fat distribution
At AVAN TOKYO GINZA LIPOSUCTION CLINIC, we emphasize:
- Ultrasound-based diagnosis
- A layered evaluation of muscle × fat × bone
- Combined liposuction when structurally required
Our goal is not merely to “slim the shoulders,” but to design a beautiful, anatomically balanced upper-body silhouette from a medical perspective.
