Jaw Botox starts relaxing the masseter within one to two weeks, but visible slimming usually appears after four to eight weeks as the muscle shrinks. Results commonly last four to six months.
Medically reviewed by [DOCTOR NAME], board-certified dermatologist · Doje Clinic, Apgujeong, Seoul · Last reviewed November 2026
Regular treatments in the first year can lead to longer-lasting slimming.
If your jaw width comes from bone rather than muscle, Botox will not change it.
Quick facts
- Jaw Botox (Masseter Reduction): None; results last 4–6 months
- Shurink Universe (Korean HIFU): Minimal; results last around 4–6 months, varies widely
Key facts
| Jaw Botox | Repeat every 4–6 months initially |
|---|---|
| Shurink Universe | Often 1–3 sessions spaced 4–6 weeks; maintenance every 4–6 months |
Related treatments
Patient questions
Frequently asked questions
How long does jaw Botox take to slim the face?
Jaw Botox starts relaxing the masseter within one to two weeks, but visible slimming usually appears after four to eight weeks as the muscle shrinks. Results commonly last four to six months.
What is Jaw Botox?
Jaw Botox relaxes the masseter muscles to slim a square jawline and can reduce clenching and grinding.
What is Shurink Universe?
Shurink Universe is a Korean-developed HIFU device that delivers focused ultrasound to contour and tighten the lower face, jawline and neck.
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Medical information on this page is general and educational. Results, downtime and suitability vary by individual. A consultation with a Doje Clinic physician is required before any treatment.