Jawline Slimming & Bruxism

Some people have overdeveloped masseter muscles. Injections into the masseter muscle can result in slimming of the jawline. They can also help to reduce the severity of Bruxism.

Best Results

1 Treatment

Duration of Results

12-16 Weeks

Treatment Recovery


Risks and Complications

Low to Moderate



Procedure Time

20 Minutes

Skin Specialist

Medically Qualified

Back to Work

Same Day


The masseter muscle runs along your jawline near the ear. You can feel it if you clench your jaw tightly. It is used to move your lower jaw up and down and side to side.

Some people have overdeveloped masseter muscles, which can present as a wide, square jawline. Teeth grinding (bruxism) can result in enlarged masseters and and give significant jaw pain and headaches.

If your primary concerns are of a cosmetic nature, injections into the masseter muscle can result in slinming of the jawline.

However, if jaw pain (e.g TMJ) or teeth grinding (bruxism) are your main concern, you should see your GP or your dentist first to rule out other problems.  Masseter muscle injections can help to reduce bruxism.

How do injections for masseter muscle reduction work?

After injection, the muscle contractions are weakened, preventing the masseter muscle from contracting so much. Following the first treatment, the masseter muscle will atrophy (waste away slightly). This will result in the jaw line becoming more ‘v-shaped’ and less square.

A side effect you may experience is a reduction in jaw clenching and/or teeth grinding.

Who is suitable for masseter muscle treatment?

If you are self-conscious about having an overly square jaw, masseter muscle may be a potential treatment to narrow your jawline and produce a more v-shaped lower face.

Additionally, teeth grinding, and jaw clenching will also be reduced.

How should I prepare for a masseter treatment?

A week before the treatment, avoid taking aspirin, ibuprofen, vitamin E and fish oil supplements. These may increase bleeding and bruising. You can take paracetamol.

If you are taking any prescribed medication, including aspirin, do not stop taking it – consult Dr. Natasha or your GP first.

Avoid drinking alcohol 24 hours before your treatment, as this also increases the risk of bruising.

What happens during a masseter treatment?


Consultation and Consent

A full consultation and treatment plan will be discussed at your consultation.


The Treatment

Your jaw slimming treatment will take around 20 minutes.


The Follow-up

All patients are reviewed at 2 weeks.


The Repeat Treatment

A new course of treatment can be administered every 12 – 16 weeeks.


After your treatment, you can go about your normal day. It is important, however, that you follow the advice of Dr. Natasha carefully. This will help you gain maximum effect from the procedure and reduce the risk of complications.

You may experience localised redness and pin-prick marks around the injection sites.

The treatment takes around 72 hours to begin working and 2 weeks for the effects to be fully realised, although you may feel most of the effect after 7 to 10 days.

Contact Dr. Natasha if you have any unusual results such as prolonged bruising, swelling, irritation or infection

What are the side effects and risks of Jawline Slimming and Bruxism injections?

Some side effects include:

  • Temporary bleeding/bruising
  • Mild swelling
  • Post-treatment headache

More serious side effects can occur for the treatment of other areas (e.g. double vision, drooping lip, difficulty swallowing or breathing, change of voice or difficulty pronouncing some words.

DO NOT have injections if:

  • You are pregnant or breastfeeding
  • You are trying to get pregnant

You will also need to let your Dr. Natasha know if:

  • You have a muscular disease (e.g. Bell’s Palsy)
  • You have any blood or nervous system disorders
  • You are taking any medications which affect blood clotting
  • You are taking any medicines
  • You have any psychological concerns

Request a consultation 07860 716208EMAIL US