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Facial Slimming – Masseter Reduction

Home / Treatments / Anti Wrinkle Injections / Facial Slimming – Masseter Reduction

Make your face morph into a more V-shaped appearance

Relax Your Masseter Muscle With BOTOX®

The masseter muscles are the muscles that are attached at the angle of your jaw and control all the movements related to chewing food. For some people, strong jaw muscles are part of their normal anatomy. However, for others a square jaw line is the result of a condition called bruxism, which causes excessive teeth grinding or clenching.

Whether you want to get rid of the pain or you’re unhappy with strong and noticeable masseter muscles, Our Facial slimming or Masseter Reduction treatment is one of the best options for you perform by our experienced Independent Nurse Prescriber.

Facial slimming or Masseter Reduction treatment relaxes the overly-engaged muscles and prevent unintentional over-use. The masseter muscles will gradually shrink in size in the following weeks. That’s how Botox helps with jawline slimming. The smaller masseter muscles give the face an oval, more feminine look with a slim jawline.

Jaw Filler

we are all about you

At KEEM Medical Aesthetic Clinic

we only use the highest quality product and all Treatments are perform by our Independent Nurse Prescriber an expert in aesthetics procedures and skincare products.


15 Minutes


Same Day


3 - 14 Days


3 - 4 Months

Botox - Area 1

Botox - Area 2

Botox - Area 3

Anti Wrinkle Injections
Price List

“For more information on our pricing, please refer to our price list here or contact us directly.”

Our patient journey


Book a consultation online, by calling or emailing or booking online


Consultation Day

Initial consultation with our Aesthetic nurse, where your skin will be examined thoroughly



Our Independent Nurse Prescriber will begin the treatment plan that you discussed


After Care

We provide detailed post-treatment aftercare so that you can take care of your skin in the comfort of your own home



You will be required to attend the clinic after 7 days for review

Popular Treatments

Our clinic offers a comprehensive range of the most advanced aesthetics treatments intended to refresh and enhance your existing natural beauty


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Skin Booster Rejuvenation

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Anti-Wrinkle Injections

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Tear Trough Filler

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Frequently Asked Questions (FAQs)

When considering Aesthetic treatments we want you to have a safe journey. The following information should allow you to know what to expect.

Here’s what to expect before, during, and after the procedure.

Before the procedure

Before getting masseter Botox, you’ll have a consultation with a medical professional (Book A Consultation Here). They’ll ask questions about your goals and concerns.

They’ll also examine your jaw and face. This allows them to determine the injection site and how many syringes you need.

During the procedure

Here’s what you can expect during the procedure:

  1. Our Practitioner will clean your skin to reduce the risk of infection. They may use a topical anesthesia to numb the area.
  2. Prepare a syringe with the botulinum toxin. The syringe will have a very thin needle.
  3. Next, A needle is inserted into your masseter muscle. Slowly withdraw the needle as the toxin is injected.
  4. The procedure is the repeated on the other side. The number of syringes necessary depend on what you’re treating.

The procedure typically lasts 15 minutes.

After the treatment

After the treatment, you can go back to your usual activities. It doesn’t require any recovery time.

However, you’ll need to avoid the following for the 24 hours:

  • Rubbing the treated area
  • Placing pressure on the treated area
  • Exercise

These actions might spread the toxin to other parts of your face.

You can expect to see full results in about 2 weeks. Some people start seeing results within 1 to 3 days.

It’s worth noting that the effects of Botox are temporary. They usually last 3 to 4 months. If you’d like to maintain the results, you’ll have to repeat the procedure.

Botulinum toxin is a naturally occurring protein produced by the bacterium Clostridium Botulinum. In a purified form, as is the case with many drugs/medications such as Penicillin, Botulinum toxin is a very safe, effective treatment not only used in cosmetic clinics, but also for several medical conditions, including migraine, cerebral palsy and excessive sweating.

All botulinum toxins are prescription only medicines (POM) and can only be prescribed by doctors, dentists and nurses or prescribing pharmacists with the prescribing qualification, following a face to face Assessment and Consultation with the qualified prescriber.

The toxin blocks the transition of chemical messages sent from the nerve to cause the muscle to contract. Without these messages, the muscle stays in a resting state until the ‘messengers’ recover. This recovery takes approximately 8 to 12 weeks on average.

The aim of this treatment is to significantly reduce the movement of the muscles causing expression lines (dynamic lines). It may not cause the expression lines themselves to disappear completely, this will depend upon the quality of your skin and may take time over a course of treatments. It may not ‘completely freeze’ the expression, particularly if extreme effort is exerted to make an expression.

Botulinum toxin is not suitable for lines present without expression (static lines), your practitioner will advise you. There may be only a partial reduction in movement this very much depends on the amount administered and location of product placement – This is not a one size fits all treatment and may be tailored to suit your individual requirements and expected treatment outcomes – discuss this with your clinician at the time of consultation.

A very fine needle is used and generally this treatment is not painful and can be well tolerated with no anaesthetic.

Ice may be helpful in numbing the skin for nervous patients as well as reducing the risk of a bruise.

Though widely used in cosmetic medicine and with an extensive evidence base to support safety and efficacy, Botulinim toxin A brands, Botox©, Azzalure© and Bocouture© are licensed for the treatment of frown lines; Botox© and Azzalure© are also licensed for the treatment of crow’s feet. All other indications are, for the time being, ‘off label’, i.e. being used beyond the terms of the original license. Many drugs are routinely used off label. Please discuss with your practitioner if you have any concerns and they will be happy to explain further.

  • Slimming of Jaw Muscles (Masseters muscle)

Your practitioner will take a detailed medical history and an assessment of your needs and expectations to ensure this is an appropriate treatment for you. This must be a nurse, doctor, dentist or prescribing pharmacist with specialised training, qualified to prescribe.

Except in exceptional circumstances this is not a treatment recommended for those under 25 or over 65.

For best results skin should be in good condition and the target lines not too furrowed. Your practitioner will assess your suitability and advise.

  • Botulinum toxin cannot be given to pregnant or breast-feeding women.
  • Not suitable for patients with certain neurological disorders.
  • Not suitable if you are currently taking certain medicines.
  • If you have previously experienced adverse reactions to any botulinum toxin treatment.
  • Treatment is not recommended if you are suffering from any skin infection in or near the treatment area or are unwell in any way (even a cold).
  • If you are taking any medicines which affect bleeding, such as aspirin or warfarin.
  • If you are currently or have recently completed a course of Roaccutane (acne treatment) in the last 18 months.

All treatments carry a degree of risk. All risks and complications will be discussed with you at consultation and prior to any treatment being agreed.

Botulinum Toxin should be administered by a healthcare professional with specialist training. Adverse events are uncommon, usually occur within a few days of treatment and are expected to be temporary, usually resolving spontaneously within weeks.

Your practitioner will provide aftercare advice designed to minimise risk and promote speedy recovery from any expected side effects.

Side effects include, but are not limited to: 

  • Bruising
  • Swelling at injection sites
  • Redness at injection sites
  • Asymmetry of expression
  • Drooping of the brow, or eyelid
  • Headache or a sensation of ‘tightness’ or ‘heaviness’

Please contact your practitioner if redness, tenderness or swelling worsens after 3 days, rather than settling. Though some tenderness is to be expected, pain is not and should be reported.

If you suffer any of the following symptoms, which may indicate a serious allergic reaction, seek immediate medical attention:

  • Itching
  • Rash
  • Red itchy welts
  • Wheezing
  • Difficulty swallowing
  • Asthma symptoms
  • Dizziness
  • Feeling faint

If you are at all concerned about symptoms you were not expecting or any that concern you, you should contact the practitioner who treated you and make an appointment to be seen.

If you wish to see someone else, contact your practitioner and ask for a copy of your treatment record and or a referral letter. This detailed information will be important if another practitioner is going to safely help or advise you.

If you suffer any adverse reactions or a poor cosmetic result, it may be that correction is not possible and you will be advised to wait until the muscle recovers and the toxin wears off. All side effects are temporary and reversible as the effects wear off.

If you have suffered a serious side effect, related to the medicine or product used (rather than the technique of the practitioner), you may report to The Medicines and Healthcare Regulatory Authority (MHRA) using The Yellow Card Scheme

  • All make up will need to be removed prior to the Anti-wrinkle/Anti-ageing treatment, attend ‘fresh faced’ if possible. Contamination with makeup can cause infection.
  • Taking the following within 72 hours of treatment may increase your risk of bruising – Alcohol, Aspirin, Ibuprofen, St. John’s Wort, Fish oils, Gingko Biloba, Vitamins C and E.
  • Do cancel if you are at all unwell, even minor coughs and colds can increase your risk of post Anti-wrinkle/Anti-ageing treatment complications.
  • Do contact the clinic to discuss any illness or new medicines prior to attending.

Most people are able to continue with normal activities. Some will have some redness, pin-prick marks, possibly minor swelling which should settle within an hour. Bruising may be more apparent the next day and can take up to 10 days to fade. Tenderness should settle within 48 hours. It is possible to suffer a headache or a sensation of tightness or heaviness for a few days following Anti-wrinkle/Anti-ageing treatment. Pain killers may be taken as required.

After Anti-wrinkle/Anti-ageing treatment it is expected that you will start to see an improvement within 2 or 3 days. The full result may be judged at 2-3 weeks. You may be invited to attend a review appointment at 2-3 weeks where the success of the treatment may be assessed and adjustments to your personal treatment plan made if necessary.

Results tend to last 3-4 months Movement will begin recovering from 8 weeks. Frequent Anti-wrinkle/Anti-ageing treatment at intervals of less than 3 months is NOT recommended.

  • Make-up should not be worn for 12 hours’ and the skin should be kept clean, with normal cleansing. Do not use cleansing wipes which may irritate the skin.
  • Avoid extremes of heat or cold, vigorous exercise, rubbing or wearing tight hats or headgear the day of Anti-wrinkle/Anti-ageing treatment.
  • Keep using your expressions, the toxin is attracted to active muscles.

Let's Talk About Your Treatment

Our fully qualified Independent Nurse Prescriber at KEEM Medical Aesthetic Skin Clinic is here to help. Whether you have a question big or small we are here to help you.


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