Masseter Botox cost at InjectCo typically ranges from $480 to $1,200 based on 20 to 50 units per side at the current $12-per-unit rate. Treatment can gradually slim an enlarged masseter and may reduce muscle-related clenching or jaw pain. It does not correct bone width or every temporomandibular disorder, so an assessment should identify if the concern comes from the muscle, joint, teeth, or another cause.
Key takeaways
Medical disclaimer: This article is for general education and does not replace medical or dental advice. Masseter Botox for jaw slimming, clenching, and temporomandibular symptoms is an off-label use. A licensed provider must determine if treatment is appropriate.
The masseter is a large chewing muscle located near the back corners of the jaw. It activates when you bite, chew, or clench your teeth.
Masseter Botox temporarily reduces the nerve signals that make this muscle contract. As the muscle works less forcefully, two changes may occur:
The treatment does not remove fat, change the jawbone, or reshape the chin. A wide lower face caused mainly by bone structure, skin laxity, or facial volume will not respond in the same way as an enlarged masseter.
Masseter treatment is also different from FDA-approved cosmetic Botox areas. Current cosmetic approvals include forehead lines, frown lines, crow’s feet, and platysma bands, but not masseter reduction or temporomandibular disorders.
Jaw slimming and symptom relief use the same muscle, but they have different treatment goals and timelines.
| Treatment Goal | What Botox Targets | Early Change | Fuller Result |
| Jaw slimming | Enlarged masseter muscle | Less forceful contraction within one to two weeks | Narrower lower face over four to 12 weeks |
| Clenching relief | Excessive masseter activity | Reduced tightness may begin within one to two weeks | Response assessed over the following weeks |
| Muscle-related jaw pain | Painful or overactive chewing muscles | Symptoms may gradually decrease | Depends on the cause of the pain |
| Joint-related TMD | The joint itself is not directly treated | May provide little or no improvement | Dental or medical care may be needed |
Repeated clenching, strong chewing habits, and natural anatomy can make the masseters look prominent. Reducing their activity can lead to gradual muscle-volume loss.
A randomized study found that masseter thickness and volume decreased progressively during the first 12 weeks after botulinum toxin treatment. The size change was dose-dependent, which means lower amounts did not produce the same reduction as higher study doses.
Masseter Botox before-and-after results are most noticeable when the jaw width comes from muscle. The treatment will not create the same change when the mandibular bone is the main source of width.
Patients often call all jaw discomfort “TMJ,” but the temporomandibular joint is the anatomical joint. The conditions affecting the joint and surrounding muscles are called temporomandibular disorders, or TMDs.
TMD can involve the chewing muscles, the joint, a displaced disc, arthritis, or more than one problem at the same time.
Botox may help when the masseter muscle contributes to:
It does not repair damaged teeth, reposition a displaced disc, treat arthritis, or correct an abnormal bite.
A systematic review of 24 randomized trials found stronger evidence for treating masseter hypertrophy than for treating temporomandibular disorders. Evidence for muscle-related TMD pain was mixed, while evidence for disorders involving the joint itself was limited.
This is why jaw pain should not automatically lead to Botox. A dentist, physician, or orofacial pain specialist may need to identify the cause first.
InjectCo’s masseter Botox service page lists a common range of 20 to 50 units per side. Treating both sides generally requires 40 to 100 total units. The exact amount depends on muscle size, strength, asymmetry, past treatments, and the goal of the appointment.
InjectCo currently lists Botox at $12 per unit.
| Treatment Plan | Total Units | Estimated Cost at $12 per Unit |
| 20 units per side | 40 units | $480 |
| 25 units per side | 50 units | $600 |
| 30 units per side | 60 units | $720 |
| 40 units per side | 80 units | $960 |
| 50 units per side | 100 units | $1,200 |
These examples show how the cost is calculated. They are not fixed prescriptions.
Your injector considers:
Using the smallest possible unit count may lower the appointment price but may not provide enough muscle reduction. Using more units than your anatomy needs can increase the risk of chewing fatigue, hollowing, or an unbalanced result.
Botox, Dysport, Xeomin, and other wrinkle relaxers use product-specific units. Unit counts cannot be converted by treating every brand as equal.
Get Your Masseter Botox Cost Before Treatment
Review your muscle size, treatment goal, recommended units, and total price with an InjectCo nurse before booking.
Masseter Botox results develop gradually because muscle relaxation happens before visible muscle reduction.
The muscle begins contracting less forcefully. Patients treating clenching or tension may notice changes during this period, but symptom improvement is not guaranteed.
You may also notice mild fatigue when chewing firm or tough foods. This should improve as the surrounding muscles adjust.
Jawline slimming may become noticeable as the masseter begins losing volume. InjectCo lists four to six weeks as the common point when facial narrowing becomes visible.
Photos taken before treatment can help because gradual facial changes are difficult to notice from day to day.
A fuller contour change may become visible by this point. Clinical research has shown gradual reductions in masseter thickness and volume across the first 12 weeks.
The amount of slimming depends on the starting muscle size. A patient with mild masseter prominence may see a smaller change than someone with strong muscle hypertrophy.
InjectCo states that masseter Botox commonly lasts four to six months. Muscle activity gradually returns rather than switching back on at once.
Some patients may experience a shorter or longer result. Repeat treatment should follow the return of muscle activity and your provider’s recommendation.
Useful masseter Botox photos should use the same:
A relaxed after photo should not be compared with a clenching before photo. Patients can review InjectCo’s before-and-after gallery for consent-cleared examples.
Masseter injections can cause temporary side effects even when the placement is medically appropriate.
Possible effects include:
A masseter Botox appointment at InjectCo begins with a consultation. Your nurse assesses the jaw before discussing units or placing injections.
Your provider asks what brought you in and which result matters most:
You should also explain when symptoms occur and if you wake with jaw soreness, headaches, tooth sensitivity, or signs of grinding.
Your nurse asks about medications, medical conditions, dental work, bite changes, previous TMD diagnoses, and prior botulinum toxin treatment.
Botox should not replace a dental evaluation when clenching has damaged the teeth or when the source of pain remains unclear.
You will be asked to clench and relax your jaw. Your nurse examines:
This assessment helps show if the jaw width comes from the masseter or another structure.
Your provider explains the product, number of units per side, expected cost, result timeline, risks, and maintenance plan.
You can ask questions and decide not to proceed before treatment begins.
Your nurse cleans the skin and places the injections into selected points within each masseter. The procedure itself usually takes less than 15 minutes, although the complete appointment includes the consultation and treatment planning.
Your nurse explains what to avoid after treatment and when to assess the result. Mild tenderness or jaw fatigue may occur.
Contact the clinic about an uneven smile, increasing pain, significant chewing difficulty, or another unexpected change.
Start With a Masseter Assessment at InjectCo
Meet with a nurse injector to review your jaw movement, symptoms, treatment goal, recommended units, cost, and expected timeline.
Masseter Botox may fit adults with enlarged or overactive jaw muscles who understand that results are temporary. The treatment offers the most predictable facial-slimming change when muscle width, rather than bone structure, creates the square-jaw appearance.
Schedule a dental or medical evaluation before Botox when you have:
Severe bruxism can damage teeth and cause jaw pain, fatigue, and headaches. A dentist can evaluate the teeth and jaw for signs of grinding and discuss options such as a night guard or other care.
Masseter Botox may offer limited value when:
Patients whose tension is concentrated in the trapezius muscles can discuss Traptox for traps and posture as a separate service. Treating the jaw will not correct every source of neck or shoulder discomfort.
Masseter Botox places botulinum toxin into the large chewing muscles at the sides of the jaw. It temporarily reduces muscle activity and may support jaw slimming or relief from muscle-related clenching.
InjectCo lists 20 to 50 units per side and charges $12 per unit. Treating both sides generally costs about $480 to $1,200 based on a total of 40 to 100 units.
A common InjectCo range is 20 to 50 units per side. Muscle size, strength, asymmetry, treatment goal, and prior response determine the recommendation.
InjectCo states that results commonly last four to six months. Muscle activity and jaw width gradually return as the effect fades.
It may help symptoms caused by overactive chewing muscles, including tightness, clenching, and muscle-related pain. Evidence is mixed for TMD overall, especially when the problem involves the joint rather than the muscle.
It can narrow the lower face when enlarged masseter muscles create the width. It cannot change the jawbone or guarantee a specific facial shape.
Muscle relaxation may begin within one to two weeks. Visible slimming commonly appears after four to six weeks, with further changes possible through approximately 12 weeks.
Temporary chewing fatigue or reduced bite force can occur, especially with firm foods. Your injector should consider muscle strength and functional needs before recommending units.
No. Botox treatment for masseter reduction, clenching, and TMD symptoms is off-label. Your provider should explain this during consultation.
Masseter Botox may provide two useful changes when an enlarged or overactive muscle is causing concern: gradual lower-face slimming and reduced muscle activity. Those benefits should not be treated as proof that Botox can correct every jaw shape or source of TMD pain.
An InjectCo nurse will examine your masseters, review your symptoms, explain when dental care should come first, and confirm the units, cost, timeline, and possible risks before treatment.
Explore Masseter Botox With InjectCo
Review your jaw shape, muscle activity, clenching symptoms, treatment options, recommended units, and total cost with a licensed nurse injector.
