When overused, the masseter muscle can cause a square-looking jawline, but by injecting muscle relaxing injections, nerve signals are blocked and no longer allow the muscle to contract as tightly. Therefore, reducing its size and resulting in a softer angle at the jaw, a less square jaw and a more youthful oval face.

An effective treatment for reducing a prominent or asymmetric jaw line, the procedure has no downtime and patients generally notice softening of the masseter muscle after 1 week and softening of the jaw line at around 6-8 weeks.

At River Aesthetics we always aim for a soft, natural look which allows us to achieve a significant line improvement whilst still maintaining normal facial expression and helping restore a youthful appearance. As well as contouring the jawline, muscle relaxing injections can also be used to reduce a gummy smile, treat excessive sweating, alleviate teeth grinding and eradicate fine lines & wrinkles.

Find out more about this treatment and book your consultation with us today.

Teeth Grinding Treatment

A common request we are seeing more and more of at River Aesthetics is the correction of an enlarged jaw, which is often caused by the unconscious clenching or grinding of the teeth, commonly known as Bruxism.

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What are muscle relaxing injections?

Muscle relaxing injections, also known as Botulinum Toxin Type A, is a naturally purified protein that blocks nerve signals at the injection point. The injected muscle will no longer be able to contract as tightly, causing them to temporarily relax and soften.

What brand of muscle relaxing injections do you use?

Here at River Aesthetics, we use a brand called Azzalure

Do you see the results immediately after?

You will start seeing results 72 hours after treatment, optimum results are 2 weeks post treatment.

How long do anti-wrinkle injections last?

On average 3-4 months depending on age and muscle activity.

How much do anti-wrinkle injections cost?

Anti-wrinkle injections with River Aesthetics start from £225.

Is the treatment painful?

Most clients describe the sensation as a small scratch. No anaesthetic is required.

Treatment Summary

Procedure Time
30 Minutes
Recommended No. of Treatments
Not Required
Side Effects
Infection, bruising
2 weeks
Duration of Results
3 - 6 months
Back to Work
Full Recovery
24 hours

Treatment Results

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Expert Comment

Dr Victoria Manning - River Aesthetics

Dr Victoria Manning


“Jawline contouring is definitely on trend this year; we ensure that facial harmony is respected for both men and women.”

Client Testimonials

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