How Long Does Masseter Botox Last? Timeline and Maintenance

Masseter Botox is a popular way to slim a square jaw, but its effect is temporary. Understanding the timeline helps you plan maintenance, especially if you live abroad and visit Seoul only once or twice a year.

1. Week-by-week timeline

Days 3 to 5: the muscle begins to relax; chewing hard food may feel slightly weaker.

Weeks 2 to 4: the muscle starts to reduce in size, though the change may be subtle.

Weeks 4 to 8: visible slimming of the lower face as the muscle shrinks.

Months 3 to 6: the effect is maintained, then gradually fades as muscle activity returns.

2. How long does it last?

Results typically last around three to six months. Factors such as dose, muscle strength, teeth grinding and metabolism affect longevity. Strong muscles and frequent clenching may shorten results.

3. Signs it is wearing off

Your jaw may start to feel stronger when chewing, and the angle of the jaw may look slightly fuller in photos. Some people notice clenching or grinding returning.

4. How often to repeat

Many patients repeat masseter Botox every four to six months at first. With repeated treatments, the muscle may stay smaller for longer, and some people can extend the interval over time. Your doctor will adjust dose and timing.

5. Does it lose effect over time?

A small number of people develop reduced response after many treatments. Using appropriate doses and, where suitable, purified toxins such as Xeomin may help reduce this risk.

6. Making results last longer

Avoid habitual gum chewing and very hard foods.

Address teeth grinding with your dentist if needed.

Keep a consistent maintenance schedule.

7. Cost

At MIN Clinic, masseter or full-face Botox typically costs KRW 300,000 to KRW 700,000. See our event price list.

8. Planning as an international patient

Because slimming takes four to eight weeks to appear, many visitors schedule masseter Botox at the start of their trip and plan the next session on a later visit.

Conclusion

Masseter Botox shows visible slimming at four to eight weeks and typically lasts three to six months, with regular maintenance keeping the jaw slim. Message our English-speaking team on WhatsApp to plan your schedule, or read more on our Botox page.

This article is for general information and does not replace medical advice. Results vary by individual, and a doctor's consultation is required before any treatment.