Teeth grinding, jaw clenching and an enlarged masseter muscle can affect comfort, sleep quality, facial shape and confidence. At Skin and Scar Care Clinic in Altrincham, we offer a medical consultation for patients concerned about jaw tension, teeth grinding, jawline heaviness or a square lower-face appearance.
Following a detailed assessment, your clinician will advise whether a prescription-only muscle-relaxing treatment may be suitable for you. This treatment is commonly used to relax the overactive masseter muscles, helping to reduce jaw clenching and soften the appearance of a wider jawline over time.
What is teeth grinding?
Teeth grinding, also known as bruxism, is when you grind, clench or tighten your teeth, often without realising it. This can happen during the day or while sleeping.
Common signs may include:
- Jaw aching or tightness
- Facial muscle tension
- Morning headaches
- Worn, chipped or sensitive teeth
- Ear, jaw or temple discomfort
- Clicking or discomfort around the jaw joint
- A bulky or square appearance to the lower face
- A partner noticing grinding sounds during sleep
If you have tooth damage, tooth sensitivity, jaw pain, facial pain or ear pain, we recommend seeing a dentist for assessment. A dental night guard may also be required to protect the teeth.
What causes a wider jaw or square lower face?
The lower face may appear wider when the masseter muscles become enlarged. The masseter muscles sit at the angle of the jaw and are used for chewing. Over time, repeated clenching, grinding, chewing gum, stress-related jaw tension or naturally strong jaw muscles can make this area look more prominent.
Relaxing the masseter muscles can help to reduce muscle activity and gradually slim the lower face, creating a softer jawline contour.
How does jaw slimming treatment work?
Jaw slimming treatment targets the masseter muscles, which are the main chewing muscles at the side of the jaw.
When these muscles are overactive or enlarged, carefully placed prescription-only muscle-relaxing injections may help to reduce excessive contraction. Over time, this can reduce jaw tension and allow the muscle to gradually reduce in size.
The aim is not to change your face dramatically, but to create a softer, more balanced and natural-looking lower-face shape.
What to expect at your consultation
Your appointment begins with a full facial and medical assessment.
We will assess:
- Your jawline and lower-face shape
- Masseter muscle size and activity
- Bite pattern and clenching habits
- Jaw discomfort or tension
- Medical history
- Dental history
- Previous aesthetic treatments
- Suitability for prescription-only treatment
- Whether dental referral or a night guard may also be needed
You will be asked to clench your teeth so the clinician can feel the masseter muscle and assess the appropriate treatment area.
If suitable, the treatment plan, expected results, risks, alternatives and aftercare will be explained clearly before proceeding.
What happens during treatment?
The treatment is quick and usually well tolerated.
Small injections are placed into the masseter muscles on each side of the jaw. The appointment itself is usually short, and most patients can return to normal daily activities shortly afterwards.
There is usually minimal downtime, although mild tenderness, swelling or small bruises can occasionally occur.
Timeline and results
Immediately after treatment
You may notice small bumps, mild redness or tenderness at the injection points. These usually settle quickly.
3-7 days
The muscle-relaxing effect may begin to develop gradually. Some patients start to notice less jaw tension during this period.
2-4 weeks
Jaw clenching and muscle tightness may feel more improved. The masseter muscle starts to relax more noticeably.
6-8 weeks
Jaw slimming and lower-face softening usually become more visible as the muscle activity reduces.
3 months
Results are usually well established. A review appointment may be recommended to assess symmetry, muscle response and whether any adjustment is needed.
4-6 months
The effect gradually wears off over time. Maintenance treatment may be required depending on your muscle strength, clenching habits and goals.
How many sessions will I need?
Many patients notice improvement after one treatment, but results vary. Stronger masseter muscles or long-standing clenching may require a staged approach.
Maintenance is usually considered every 4-6 months, although some patients may need treatment more or less often depending on their response.
Is jaw slimming treatment painful?
Most patients describe the treatment as a brief pinching sensation. The masseter muscle is a strong muscle, but the injections are quick and usually well tolerated.
A topical numbing cream is not always required, but this can be discussed if you are nervous about injections.
Is there downtime?
Downtime is usually minimal.
After treatment, you should avoid rubbing or massaging the area, strenuous exercise, alcohol, sauna, steam and facial treatments for the advised period. You will receive full aftercare instructions at your appointment.
Who is suitable?
You may be suitable if you have:
- Enlarged masseter muscles
- Teeth grinding or jaw clenching
- A square or wide lower-face appearance
- Jaw tension related to muscle overactivity
- Realistic expectations
- Good general health
- No contraindications to treatment
This treatment is most effective when lower-face width is caused by muscle bulk rather than bone structure, fat or significant skin laxity.
Who is not suitable?
This treatment may not be suitable if you:
- Are pregnant or breastfeeding
- Have an active infection at the treatment site
- Have a known allergy or hypersensitivity to the proposed treatment
- Have certain neuromuscular conditions
- Have significant swallowing or speech difficulties
- Have uncontrolled medical conditions
- Are taking medicines that may interact with treatment
- Have unrealistic expectations
- Have lower-face width mainly due to bone structure rather than muscle
- Have severe jaw joint disease requiring dental or maxillofacial care
- Have untreated dental problems contributing to pain or grinding
- Suitability can only be confirmed after a consultation.
Important dental note
This treatment may reduce muscle activity, but it does not protect the teeth from grinding damage. If you have tooth wear, sensitivity, broken teeth, gum recession or jaw joint symptoms, we recommend seeing a dentist.
A dental night guard, bite assessment, stress management or jaw physiotherapy may also be required as part of a complete bruxism management plan.
Benefits of masseter treatment
Possible benefits include:
- Reduced jaw clenching
- Less jaw muscle tension
- Softer lower-face contour
- Slimmer jawline appearance
- Improved facial balance
- Non-surgical treatment
- Minimal downtime
- Gradual natural-looking results
Possible side effects
Possible side effects include:
- Mild redness
- Bruising
- Swelling
- Tenderness
- Headache
- Temporary asymmetry
- Temporary chewing weakness
- Smile changes if product spreads to nearby muscles
- Incomplete response
- Need for adjustment or repeat treatment
- Rare allergic reaction
- Rare swallowing or speech difficulty
Your clinician will discuss risks in detail before treatment.
Frequently Asked Questions
Yes, most patients chew normally after treatment. Some people notice temporary chewing fatigue with very firm foods, especially after the first treatment or if the masseter muscles are very strong.
It may help reduce muscle force and jaw clenching, but it is not guaranteed to stop grinding completely. Bruxism can be linked to stress, sleep, dental bite, lifestyle and other factors, so a combined approach may be needed.
No. The effects gradually wear off. Maintenance is usually required if you wish to continue the result.
If the width is mainly due to bone structure, muscle-relaxing treatment will have limited slimming effect. It works best when the masseter muscle is enlarged.
Yes. Depending on your goals, jaw slimming may be combined with chin filler, jawline contouring, skin tightening or facial rejuvenation treatments. This will be discussed during consultation.
Disclaimer
All prescription-only treatments require a consultation and medical assessment before they can be prescribed or performed. Suitability is not guaranteed.
Results vary between individuals and depend on muscle size, muscle strength, clenching habits, anatomy, metabolism, lifestyle factors and aftercare. We always aim to provide the best possible care, but results cannot be guaranteed.
This treatment is not a replacement for dental care. If you have tooth damage, tooth sensitivity, jaw joint problems, facial pain or ear pain, you should seek dental or medical advice.
Some uses may be outside licensed indications and will be discussed during your consultation if relevant.
Possible side effects, risks, limitations and alternatives will be explained before treatment. A personalised treatment plan will be provided after assessment.