Lower Face Botox: Jawline, Chin, Gummy Smile and Neck
Oct 02, 2026
Lower Face Botox: Jawline, Chin, Gummy Smile and Neck
Botulinum toxin treatment is not limited to forehead lines, frown lines and crow's feet.
In selected patients, it can be used in the lower face and neck to modify muscular activity affecting the jaw, chin, corners of the mouth, smile and neck.
However, the lower face differs considerably from the upper face.
Its muscles are closely interconnected and participate in smiling, speaking, lip movement, chewing and swallowing. Accurate muscle identification, dosing and injection placement are therefore particularly important.
Why is lower face Botox more technically sensitive?
Around the mouth and chin, multiple small muscles work together to produce precise facial expressions and functional movements.
Unintended spread of botulinum toxin into an adjacent muscle can temporarily alter the smile, lip movement, speech or other functions.
For this reason, modern anatomical literature and expert recommendations emphasize detailed anatomical knowledge and individualized assessment when treating the lower face.
What is Masseter Botox?
The masseter is a large muscle located on each side of the jaw and plays an important role in chewing.
In some patients, masseter hypertrophy contributes to a wider or more square appearing lower face.
When true masseter hypertrophy is present, botulinum toxin can reduce muscular activity and may gradually reduce muscle volume.
This can create a slimmer lower facial contour in appropriately selected patients.
Does Masseter Botox dissolve jaw fat?
No.
Botulinum toxin does not dissolve fat.
If lower facial width is caused primarily by skeletal structure, adipose tissue or skin laxity rather than masseter hypertrophy, Botox will not treat the underlying cause.
Assessment at rest and during jaw clenching helps determine the contribution of the masseter.
Can Masseter Botox treat teeth grinding?
Botulinum toxin is also used in selected patients with excessive activity of the muscles of mastication.
However, bruxism and temporomandibular disorders are multifactorial conditions.
Reducing masseter contraction may help certain patients, but it does not address every cause of teeth grinding or TMJ related symptoms.
Functional and medical assessment remains important.
What is Chin Botox?
The mentalis muscle contributes to lower lip movement and the appearance of the chin.
Excessive mentalis activity can create a pebbled or dimpled appearance sometimes described as peau d'orange.
Carefully placed botulinum toxin can reduce excessive muscular contraction and create a smoother appearance in selected patients.
Can Botox correct a recessed chin?
Not directly.
If poor chin projection is primarily caused by skeletal anatomy or insufficient structural support, relaxing the mentalis does not replace the missing structure.
The patient should be assessed to determine whether the concern is muscular, structural or a combination of both.
What is DAO Botox?
The depressor anguli oris, or DAO, contributes to downward movement of the corners of the mouth.
In some patients, prominent DAO activity creates a persistently downturned appearance.
Carefully reducing this activity can decrease the downward muscular pull and improve balance around the mouth.
However, the DAO lies near other muscles involved in lower lip movement, making accurate injection placement particularly important.
Can DAO Botox lift the corners of the mouth?
It can produce a subtle improvement when excessive downward muscular pull is an important component of the problem.
It does not correct every cause of downturned mouth corners or marionette lines.
Volume loss, tissue laxity and structural changes may also contribute and may require a different or combined treatment strategy.
How can Botox treat a gummy smile?
A gummy smile can have several different causes.
In some patients, excessive elevation of the upper lip during smiling is partly related to strong activity of lip elevator muscles.
Small, accurately placed doses of botulinum toxin can reduce this muscular elevation and decrease gingival display during smiling.
Not every gummy smile is muscular, however.
Dental proportions, gingival anatomy, skeletal relationships, lip length and other structural factors may contribute.
The cause should therefore be diagnosed before treatment.
Can Botox change the smile too much?
Yes.
Excessive weakening of lip elevator muscles or unintended effects on adjacent muscles can produce an unnatural or asymmetric smile.
Conservative, anatomically appropriate dosing is therefore important.
How is Botox used in the neck?
The platysma is a broad superficial muscle extending across the neck toward the lower face and jaw.
With aging and muscular activity, platysmal bands may become more visible.
Botulinum toxin can reduce activity in selected portions of the platysma and improve the appearance of platysmal bands in appropriate patients.
Modifying platysmal activity may also create a limited improvement in the appearance of the jawline-neck transition.
What is the Nefertiti Lift?
The term Nefertiti Lift describes botulinum toxin techniques targeting portions of the platysma to reduce downward muscular pull and improve the appearance of the jawline and neck.
The name can sometimes create unrealistic expectations.
Botulinum toxin does not remove excess skin, eliminate submental fat or reposition tissues like surgery.
The technique is most relevant when platysmal activity is a meaningful component of the concern.
Can neck Botox treat neck laxity?
Not all neck laxity is muscular.
When the primary issue is excess skin, significant loss of elasticity, adipose tissue or structural aging, botulinum toxin cannot correct the entire problem.
Other treatment modalities may be required depending on the underlying cause.
Can Botox define the jawline?
It can contribute in selected cases, but the phrase Jawline Botox can refer to different treatments.
The goal may be to reduce an enlarged masseter, modify platysmal activity or address another muscular component within a broader treatment plan.
The underlying cause should therefore be identified rather than treating the jawline as one universal injection area.
Are all lower face Botox treatments officially approved?
No.
Regulatory status varies according to the botulinum toxin product and country.
Many common aesthetic lower facial applications have developed through clinical research, anatomical studies and expert experience but may remain off label for a particular product or jurisdiction.
Some neck indications, including platysmal bands, are now approved for specific products in certain markets.
The official prescribing information for the product being used should therefore be consulted.
What are the risks of lower face Botox?
Temporary redness, swelling, tenderness and bruising can occur at injection sites.
More importantly, lower facial treatment carries muscle specific functional risks.
Unintended muscle effects can produce temporary smile asymmetry or altered lip movement.
Masseter treatment may affect chewing strength in some patients.
Neck treatment also requires caution because of the important functions of surrounding structures.
This is why lower facial treatment requires particularly careful anatomical planning.
Are lower face doses the same as forehead Botox doses?
No.
There is no single dose that can be applied across facial muscles.
The mentalis, DAO, masseter and platysma differ greatly in size, function and anatomy.
Units are also specific to individual botulinum toxin formulations and should not simply be converted directly from one product to another.
Dose should therefore not be copied from another patient or another product.
Why should the lower face be assessed during movement?
Dynamic examination is particularly important.
The clinician may ask the patient to smile, show the teeth, move the lips, contract the chin, clench the jaw or tense the neck.
These movements help identify the muscles contributing to the concern and reveal pre-existing asymmetries before treatment.
Can lower face Botox be combined with fillers?
Yes, in selected patients.
Botulinum toxin addresses a muscular component, while dermal fillers may address concerns involving volume, structural support or contour.
Not every patient requires both.
The treatment plan should begin by identifying the cause of the concern and selecting the treatment that addresses that cause.
Can it be combined with skin tightening devices?
Different treatments can address different anatomical components.
Botulinum toxin modifies muscular activity, while energy based devices target different tissue characteristics depending on the technology.
When muscular activity coexists with skin laxity or changes in skin quality, a multimodal approach may be more appropriate than expecting one treatment to correct every component.
The bottom line
Lower face Botox can be a precise and useful treatment when muscular activity is an important part of the patient's concern.
Selected applications include masseter hypertrophy, excessive mentalis activity, downward pull from the DAO, certain types of gummy smile and platysmal bands.
It is not, however, a universal treatment for the jaw, chin or neck.
Lower facial muscles are closely interconnected and perform important functional roles. Accurate diagnosis, conservative dosing and precise anatomical placement are therefore more important than simply increasing the number of treated areas.
Frequently asked questions
Can Masseter Botox slim the face?
It may reduce lower facial width when masseter hypertrophy is responsible, but it does not dissolve fat or change skeletal structure.
Can Botox treat a gummy smile?
It can help when excessive activity of upper lip elevator muscles contributes to the problem.
Can Botox lift downturned mouth corners?
Reducing DAO activity can provide a subtle improvement in selected patients, but the result depends on the cause of the concern.
Can Botox treat neck lines?
It can improve dynamic platysmal bands, but it does not treat every type of neck wrinkle or skin laxity.
Is lower face Botox safe?
It can be used safely in appropriately selected patients when performed by a qualified practitioner, but precise anatomy and dosing are particularly important because these muscles participate in facial and oral function.
Can Botox Cause Facial Sagging or a Frozen Look?
This content is intended for general medical education and does not represent an individualized treatment plan. Lower face and neck botulinum toxin treatments require appropriate medical, anatomical and functional assessment.
