Will Masseter Injections Change My Smile?
For many people considering masseter muscle treatment, one of the most common concerns is whether it will affect their smile. Because the lower face plays such a central role in expression, even a subtle change can feel significant.
The good news is that when masseter injections are performed correctly by a qualified medical practitioner, the risk of affecting your smile is low. This blog explains why precision matters, how the treatment works, and what to expect in the rare event that changes do occur.
Why the Masseter Is Treated in the First Place
Masseter injections are often used to manage muscle overactivity caused by clenching or grinding, or to reduce bulk in the jaw for those seeking a softer facial contour. The goal of treatment is to relax the targeted chewing muscles while preserving natural function and expression.
Understanding Facial Muscle Anatomy
The masseter is just one of several muscles in the lower face. It sits near, but separate from, other muscles involved in smiling, such as the zygomaticus major and minor, risorius, and buccinator. These surrounding muscles lift and retract different parts of the mouth.
When injectables are placed too deeply or spread beyond the intended area, there is a small risk of temporarily affecting these neighbouring muscles. This may result in:
Mild smile asymmetry
A feeling of weakness when chewing or speaking
Slight changes in facial animation
However, these effects are uncommon and typically resolve on their own over several weeks.
Why Practitioner Skill and Technique Matter
Minimising risk begins with selecting a medical practitioner who understands facial anatomy in depth and has experience with advanced injection techniques. Key safeguards include:
Precise muscle mapping to identify safe zones for injection
Individualised dosing based on muscle size and activity
Gradual treatment plans, especially for first-time patients
By focusing only on the masseter and avoiding spread to nearby muscles, experienced practitioners significantly reduce the chance of affecting your smile.
What If Changes Do Happen?
In rare cases where a temporary smile change occurs, it is almost always reversible. The effects of muscle-relaxant injections are not permanent. Any unintended impact on nearby muscles will generally subside within a few weeks to months as the product naturally breaks down.
During this time, your practitioner may offer advice on managing function or recommend follow-up appointments to monitor your response.
What You Can Do to Prepare
If you are concerned about your smile, raise this with your practitioner during your consultation. This allows them to assess your facial anatomy carefully, explain their approach, and tailor your treatment plan to minimise risk.
At TT Aesthetics, we prioritise safety, transparency, and personalised care. Our treatment plans are designed with function and expression in mind, ensuring outcomes that feel as natural as they look.
To learn more about your masseters book a consultation with a qualified expert, book TT Aesthetics.
