After injection, muscle activity gradually decreases. Over time, the muscle may become smaller, softening the jaw area and making the face look slimmer.
What is masseter Botox?
Masseter Botox involves injecting Botulinum Toxin into the Masseter, the chewing muscle at the angle of the jaw.
The medicine temporarily reduces muscle activity. With less use, muscle size gradually changes over time.
The visible result is therefore gradual rather than immediate after injection.
Highlights of the masseter Botox programme
- Helps reduce jaw muscle activity
- Suits people whose large jaw is caused by muscle
- Helps the lower face look slimmer in suitable candidates
- No surgery required
- The procedure does not take long.
- Doses can be adjusted to individual muscle strength
- Daily life can generally be resumed after treatment
What can masseter Botox help with?
Reducing jaw muscle size
As Masseter activity decreases, muscle size may gradually reduce over time.
Making the jaw area look smaller
When muscle causes a wide jaw, the lower face may look slimmer as muscle size decreases.
Addressing jaw asymmetry
Some people have different-sized jaw muscles on each side. The doctor can adjust the number of units separately for each side.
Reducing jaw muscle force
People who clench their teeth or use their jaw muscles heavily may feel that these muscles are firm and prominent. The doctor can assess whether Botox is suitable.
Who is masseter Botox suitable for?
This programme may suit people who:
- Have enlarged jaw muscles
- Have a wide lower face caused by muscle
- Have a prominent jaw muscle bulge when clenching their teeth
- Have different-sized jaw muscles on each side
- Want a softer-looking jaw area
- Have had masseter Botox and want assessment for repeat injections
Which causes of a large jaw can Botox help with?
A large jaw can have several causes.
A large jaw caused by muscle
Botox can directly help this type because the medicine acts on muscle.
A large jaw caused by bone
Botox cannot make the jawbone smaller.
A jaw or facial contour that looks large because of fat
Botox does not dissolve fat.
Some people have a combination of muscle, bone, and fat, so an assessment is needed to determine how much change Botox may produce.
How can I check if my large jaw is muscle-related?
A simple check is to clench your teeth firmly and touch the angle of your jaw with a finger.
A noticeable muscle bulge suggests that the Masseter contributes considerably to your face shape.
However, this is only a preliminary check. The doctor assesses actual muscle size and strength before injection.
Can masseter Botox really slim the face?
Yes, in people whose facial width comes from the jaw muscles.
As the muscle becomes smaller, the lower face looks narrower and slimmer within its existing structure.
However, if facial width is mainly caused by bone or fat, Botox results may be less noticeable than in people with large jaw muscles.
Does masseter Botox create a V Shape face?
It may slim the lower face, but cannot turn everyone's facial structure into a V Shape.
Face shape after treatment also depends on several factors, such as:
- Jawbone width
- Fat around the cheeks and jawline
- Chin shape
- Skin sagging
- Original jaw muscle size
The whole face should therefore be considered, rather than only the jaw.
How many units of masseter Botox are needed?
There is no fixed number of units for everyone.
The doctor considers:
- Muscle size
- Muscle strength
- Differences between the two sides
- Previous injection history
- Desired results
- The product used
Some people may need different doses on each side if one muscle is larger or stronger.
Must both sides receive the same amount?
Not necessarily.
The left and right sides of the face are often not completely symmetrical. Jaw muscle size may differ because of chewing habits or the original structure.
The doctor may therefore use different numbers of units on each side for a more balanced overall appearance.
When do masseter Botox results appear?
Muscle activity decreases first after injection, but the muscle does not become smaller immediately.
Time is needed for muscle size to change gradually before differences in the jaw area become visible.
Generally, changes in face shape take longer than Botox treatment for wrinkles.
How long does masseter Botox last?
Botox effects are temporary.
Over time, muscles gradually resume activity. Duration varies by person and depends on:
- Muscle size and strength
- Dose used
- Product
- Daily muscle use
- The body's response
When the muscles seem more prominent again, visit the doctor to assess whether repeat treatment is needed.
How often is masseter Botox needed?
Not everyone needs the same treatment interval.
Some people's muscle activity returns sooner, while others retain results for longer.
Let the doctor assess muscle activity before repeat injections. There is no need to rush additional treatment if the previous effect remains.
Can masseter Botox cause hollow cheeks?
This can happen in some people, particularly those with little cheek volume already or when an excessive dose is used.
As the jaw muscles shrink, the side profile may change and existing cheek hollowness become more noticeable.
Before treatment, the jaw, cheeks, and overall facial structure should be considered together, rather than focusing only on making the jaw as small as possible.
Can masseter Botox make a double chin more noticeable?
In some people, reducing jaw muscle size changes the lower facial shape, making existing fat or sagging along the jawline more noticeable.
Botox is not the only cause of a double chin, and it does not directly reduce fat or lift the skin.
If a double chin or sagging is already present, it should be assessed together before planning treatment.
Can masseter Botox make chewing difficult?
The Masseter is one of the chewing muscles, so some people may notice reduced chewing strength or easier fatigue, particularly early after injection.
The sensation varies with dose and original muscle strength.
If symptoms are unusually severe or affect daily life, return to the doctor.
Does masseter Botox help with teeth grinding?
Botox reduces Masseter activity, so it may be used in some people with overactive jaw muscles.
However, grinding or clenching can have several causes, and Botox does not address all of them.
If you have grinding, jaw pain, joint pain, or associated dental concerns, seek assessment from a doctor or dentist as appropriate.
How do masseter Botox and a Botox jawline lift differ?
Masseter Botox
Targets the Masseter to reduce jaw muscle activity and size.
Botox jawline lift
Targets certain muscles affecting the jawline and neck to refine facial contour details.
The programmes can be combined in some people, but their goals and injection sites differ.
How do masseter Botox and lifting devices differ?
The two programmes address different concerns.
Masseter Botox
Suitable for a prominent jaw caused by muscle.
Lifting devices
Focuses on skin and tissue firmness.
If both enlarged jaw muscles and sagging are present, several programmes may need to be assessed together.
Masseter Botox injection steps
1. Assess face shape
The doctor assesses jaw width and the lower facial shape.
2. Assess the muscles
You are asked to clench your teeth to assess muscle size, strength, and differences between the sides.
3. Plan sites and doses
Determine injection points and units appropriate to the muscles.
4. Prepare the skin
Clean the injection area.
5. Inject Botox
The doctor injects the product at the planned sites.
6. Provide aftercare advice
You can resume daily life after treatment while following the doctor's care instructions.
Preparing for masseter Botox injections
Before treatment, inform the doctor about:
- Underlying conditions
- A history of drug allergies
- Current medications and supplements
- A history of Botox injections
- Previous brand, dose, and injection date, if known
- Side effects from previous injections
- Neurological or muscle-related conditions
- Pregnancy or breastfeeding
- Inflammation or infection at the injection site
Aftercare following masseter Botox
Follow the doctor's aftercare advice. In general:
- Avoid pressing or massaging the injection sites yourself
- Avoid impacts to the jaw early on
- Keep needle punctures clean
- Do not increase, reduce, or repeat injections yourself
- Monitor symptoms after treatment
- Attend follow-up as scheduled