The desire for a slimmer, more defined facial contour has made non-surgical jaw reduction one of the most requested aesthetic treatments in 2026. Many of our patients at LIV Clinic come to us asking about Botox for jaw reduction results, specifically hoping to soften a square jawline or reduce the appearance of a wide lower face.

Unlike traditional surgical methods that require downtime and recovery, using botulinum toxin to relax the masseter muscles offers a safe, effective, and reversible alternative. Whether you are battling teeth grinding (bruxism) or simply want a more feminine, heart-shaped face, understanding the timeline and realistic outcomes is the first step toward your transformation.

Why Trust LIV Clinic for Facial Slimming?

Facial slimming is as much an art as it is a science. At LIV Clinic in Koh Samui, we do not simply inject and send you on your way. Our medical director, Dr. Narathai Vichienkalayarut, specializes in facial sculpting and symmetry. With extensive training in aesthetic medicine and a deep understanding of facial anatomy, he ensures that your results are balanced and natural.

We have treated thousands of patients, both local and international, giving us a unique perspective on how different facial structures respond to treatment. When you choose us, you are choosing a team that prioritizes safety, uses only authentic FDA-approved products, and dedicates time to personalized consultation. We verify every product with you before the procedure because your trust is our most valuable asset.

Understanding the Masseter Reduction Procedure

The masseter muscles are the strong muscles at the side of your jaw used for chewing. In many people, these muscles can become overdeveloped (hypertrophy) due to genetics, stress, or habitual teeth grinding. This bulkiness creates a square, masculine jawline.

By injecting a precise amount of neuromodulator (such as Allergan or Nabota) into these muscles, we block the nerve signals that cause them to contract. Over time, the underused muscle shrinks (atrophies) naturally, leading to a slimmer, smoother facial profile.

Timeline: When Will I See Botox for Jaw Reduction Results?

One of the most common misconceptions is that results are immediate. Unlike dermal fillers which add volume instantly, muscle relaxation takes time. Here is a realistic timeline of what you can expect after your visit to LIV Clinic.

Week 1: The “Softening” Phase

For the first few days, you likely won’t see a visible change in shape. However, if you suffer from teeth grinding, you may notice that your jaw feels less tense and you wake up with fewer headaches.

Weeks 2-3: The Onset of Action

The muscle activity begins to decrease significantly. You might feel a slight difference when you chew, which is normal. The jawline may start to look slightly softer, but the major slimming has not happened yet.

Weeks 4-6: Peak Slimming Results

This is the “magic” window. By one month, the muscle has atrophied enough to show a visible reduction in width. This is when patients typically report their friends asking if they have lost weight. The face appears more V-shaped and contoured.

Comparison: Botox vs. Other Slimming Methods

To help you decide if this is the right path for you, we have compared masseter injections against other popular facial contouring options.

Feature Masseter Botox (Jaw Reduction) Buccal Fat Removal (Surgery) Chin Filler
Primary Goal Slimming muscle bulk at the back of the jaw Removing fat pads in the cheeks Elongating the chin to create a V-shape illusion
Invasiveness Non-invasive (Injections only) Surgical (Requires incision) Minimally invasive (Injections)
Downtime None (Lunchtime procedure) 1-2 weeks swelling Minimal (1-2 days swelling)
Onset of Results 4 – 6 Weeks 1 – 3 Months (after swelling subsides) Immediate
Reversibility Yes (Wears off naturally) No (Permanent) Yes (Can be dissolved)
Pain Level Low (Pinprick sensation) Moderate (Post-op soreness) Low to Moderate

Longevity of Results and Maintenance

How long do Botox for jaw reduction results last? typically, the effects endure for 4 to 6 months. The longevity depends on your metabolism and lifestyle. Patients who continue to grind their teeth heavily or chew gum frequently may see the muscle bulk return faster.

The good news is that with regular maintenance (every 4-5 months), the muscle stays in a relaxed state longer. Many of our long-term clients at LIV Clinic find they need fewer units or less frequent sessions after their third or fourth treatment as the muscle becomes naturally smaller and weaker.

Potential Side Effects and Safety

While the procedure is considered very safe, it is crucial to be aware of potential side effects. Most are mild and temporary.

  • Chewing Fatigue: You may feel tired after eating tough foods like steak or nuts for the first week.

  • Smile Asymmetry: If the product spreads to the nearby risorius muscle (the “smile muscle”), it can temporarily affect your smile. This is why choosing an expert injector like Dr. Narathai is vital to ensure precise placement.

  • Loss of Volume: For older patients with loose skin, reducing muscle volume too much can sometimes lead to slight skin laxity. We assess skin quality beforehand to avoid this.

Maximizing Your Results

To get the best possible outcome from your treatment in Koh Samui, we recommend the following:

  • Avoid massaging the area for 24 hours to prevent the toxin from spreading to unwanted muscles.

  • Skip the sauna and hot yoga for a day to keep the product stable.

  • Stay upright for at least 4 hours after the injection.

  • Combine treatments: For a complete V-shape transformation, many patients combine jaw reduction with Chin Fillers to elongate the face or Hifu to tighten the skin along the jawline.

Frequently Asked Questions

Will Botox for jaw reduction affect my ability to eat? No, it will not stop you from eating. You will still have plenty of strength to chew normal food. We advise avoiding excessively hard or chewy foods (like chewing gum or squid) just to prolong the results, not because you can’t eat them.

Does the injection hurt? Most patients describe the sensation as a quick pinch or an ant bite. We use very fine needles and can apply a cold pack or numbing cream to ensure you are comfortable.

Can I stop the treatment once I start? Yes. If you decide to stop, your masseter muscles will gradually return to their original size over several months. There is no permanent negative effect from stopping.

Is it cheaper to get this done in Thailand? Generally, yes. The cost of medical aesthetic treatments in Thailand is often significantly lower than in the US, Europe, or Australia, while maintaining the same high standard of care and using the exact same premium brands.

How many units will I need? This varies by person. An average female patient might need 40-60 units total (20-30 per side), while men or those with severe teeth grinding may require up to 80-100 units. A consultation is required for an exact quote.

Contact Us

Ready to achieve a slimmer, more defined jawline? Book your consultation with Dr. Narathai today.

  • Phone: +66 65-996-4242

  • Whatsapp: (+66) 65 996 4242

  • Line Official: @Livclinic

  • Email: Livclinic.samui@gmail.com

  • Address: 1/63 Bophut, Koh Samui, Suratthani, Thailand, 84320

  • Website: https://liv.clinic/

References

  1. Cleveland Clinic. (n.d.). Jaw Reduction (Masseter Reduction). Retrieved from https://my.clevelandclinic.org/health/treatments/22108-jaw-reduction

  2. American Society for Dermatologic Surgery. (n.d.). Neuromodulators for Jawline Contouring. Retrieved from https://www.asds.net/

  3. Journal of Clinical and Aesthetic Dermatology. (2021). Treatment of Masseter Hypertrophy with Botulinum Toxin. Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3935649/

  4. National Library of Medicine. (2018). Efficacy of Botulinum Toxin Type A for Treatment of Masseter Hypertrophy. Retrieved from https://pubmed.ncbi.nlm.nih.gov/

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