Botox for Jawline Slimming — VERZO CLINIC Bangkok

TL;DR: The masseter is a large chewing muscle on each side of the jaw. When overdeveloped (from genetics or habits like teeth grinding), it creates a square jaw appearance. Botox relaxes the muscle, causing it to gradually atrophy and slim down over 4-8 weeks, creating a more V-shaped face contour.

Written by Dr. Waleerat Thaweebanchongsin, over 10 years of specialized experience. Near BTS Ekkamai. LINE @verzo.

Last updated: April 2026

FAQ

How does masseter Botox create a V-shape jawline?

The masseter is a large chewing muscle on each side of the jaw. When overdeveloped (from genetics or habits like teeth grinding), it creates a square jaw appearance. Botox relaxes the muscle, causing it to gradually atrophy and slim down over 4-8 weeks, creating a more V-shaped face contour.

How many units of Botox are needed for masseter slimming?

Typically 25-50 units per side (50-100 units total) depending on muscle size and desired result. Patients with very strong masseters may need up to 60 units per side. The dosage is determined during consultation by palpating the muscle while the patient clenches.

How long until I see jawline slimming results?

Unlike wrinkle Botox which works in 3-5 days, masseter slimming takes longer because the muscle needs time to atrophy. Initial softening appears at 2-4 weeks. Visible slimming at 4-8 weeks. Peak results at 8-12 weeks. Most patients need 2-3 sessions for optimal slimming.

How often do I need masseter Botox maintenance?

Initial treatments are spaced 3-4 months apart. After 2-3 sessions, the muscle is sufficiently weakened that many patients can extend to 6-8 month intervals. Some patients eventually need only annual maintenance.

Can I combine masseter Botox with Lipo X for enhanced results?

Yes, combining masseter Botox with Lipo Lifting X in the submental (under-chin) area can dramatically improve jawline definition. Botox slims the jaw muscle while Lipo X reduces submental fat. This dual approach creates a more defined lower face contour.

Will masseter Botox affect my ability to eat?

No. The masseter is only one of several chewing muscles. You may notice slight jaw fatigue when chewing tough foods in the first 1-2 weeks, but this resolves quickly. Normal eating is unaffected throughout treatment.

How much does masseter Botox cost in Bangkok?

At VERZO CLINIC, masseter Botox ranges from 1,000-6,000 THB total depending on the brand and number of units. Hutox offers the most affordable option while Allergan provides the longest duration.

Am I a good candidate for masseter Botox?

Ideal candidates have a noticeably square jaw caused by muscle bulk (not bone structure). To check: place your hands on your jaw and clench — if you feel a significant bulge, masseter Botox can help. If the squareness is from bone, other options may be more appropriate.

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