Written by: Ellie Pranckevicius, FNP-BC, Aesthetic Nurse Practitioner & Aesthetic Injector | Facial Restoration & Regenerative Injectable Specialist, Mirror Plastic Surgery
Key Takeaways
- A gummy smile often comes from hyperactive upper lip muscles and responds well to precise, low-dose Botox injections that reduce gum exposure while preserving natural facial expression.1
- The treatment targets the levator labii superioris alaeque nasi (LLSAN) muscle using techniques like the Yonsei point, with conservative dosing that protects normal speech and chewing.
- Results usually appear within 1-2 weeks and last about 3-4 months, so maintenance treatments are needed, while surgery may suit skeletal or dental causes better.1
- Choosing an experienced provider with strong anatomical knowledge helps minimize side effects such as asymmetry or unwanted muscle weakness and supports safe, predictable outcomes.
- Schedule your personalized consultation at Mirror Plastic Surgery to see whether Botox is right for your gummy smile and receive a tailored treatment plan.
Gummy Smile Basics and How Botox Helps
A gummy smile can result from overactivity of lip elevator muscles but also from dental or skeletal structural issues such as altered passive eruption or vertical maxillary excess, often in combination. The levator labii superioris alaeque nasi (LLSAN) is the dominant muscle responsible for elevating the upper lip in most patients with a gummy smile, though other elevators can predominate in some individuals.
Botox works by temporarily reducing muscle contraction through chemodenervation. Precise, low-dose neuromodulator injections target specific lip elevator muscles, reducing excessive contraction so the upper lip rests lower during smiling and gum exposure is minimized1. Neuromodulator treatment maintains normal speech, expression, chewing, sensation, and lip position at rest while only softening excessive elevation during smiling. This selective effect sets the stage for a closer look at how smile mechanics and Botox work together.
How Botox Changes Smile Mechanics
Smile formation occurs in two stages: first, levator muscles elevate the upper lip to the level of the nasolabial fold; second, the upper lip and nasolabial folds are further elevated by the levator labii superioris muscles, the zygomaticus major muscles, and the superior fibres of the buccinator.
The LLSAN muscle originates from the infraorbital region and inserts into the upper lip and nostril. This anatomical positioning means that when the muscle contracts excessively during smiling, it pulls the upper lip too high and exposes too much gum tissue. Botox temporarily weakens this muscle by blocking nerve signals, which creates a dose-dependent reduction in lip elevation without eliminating natural expression.
The treatment specifically targets muscular hyperactivity while preserving the underlying facial anatomy. This selective approach allows patients to maintain normal lip function for speaking, eating, and subtle expressions. At the same time, it reduces the dramatic lip elevation that creates a gummy smile appearance.
Targeted Injection Points for Gummy Smile Botox
The most commonly referenced injection technique targets the Yonsei point, where OnaBoNT-A (2–3 IU per side) relaxes excessive activity of the lip-elevator muscles (LLSAN, LLS, and ZMi) and reduces gummy smile. This anatomical landmark provides consistent results when the injector identifies it correctly.
Injection patterns typically involve bilateral treatment with precise placement into the LLSAN muscle belly. The technique requires thorough understanding of facial anatomy to avoid unintended effects on adjacent muscles. Proper needle depth and angle help the neuromodulator reach the target muscle without affecting surrounding structures.
Dosing must be individualized based on muscle strength, facial anatomy, and desired outcome. This individualized approach favors conservative dosing, which prevents over-treatment while still achieving natural-looking results. The reason for this restraint is that the goal is subtle reduction in lip elevation rather than complete muscle paralysis.
Schedule your personalized anatomical assessment to receive a treatment plan tailored to your specific facial structure.
What Your Gummy Smile Treatment Visit Looks Like
Once you decide that Botox is appropriate for your gummy smile, the treatment visit follows a straightforward process. The procedure typically takes 10-15 minutes in an office setting. Before injection, the treatment area may be numbed with topical anesthetic to reduce discomfort. The provider then marks injection points based on your individual anatomy and muscle activity patterns.
Using a fine needle, small amounts of Botox are injected directly into the LLSAN muscle. Most patients experience minimal discomfort and describe the sensation as brief pinpricks. The injection process itself takes only a few minutes.
Post-treatment instructions are particularly important in Tampa’s warm climate, where heat and sun exposure can increase swelling. To minimize this risk, patients should avoid sun exposure, strenuous exercise, and lying flat for several hours after injection, because these activities increase blood flow to the face. Ice may be applied to reduce swelling, and makeup can typically be worn immediately if applied gently to avoid disturbing the injection sites.
Normal activities can usually be resumed the same day. Patients should avoid facial massage or manipulation of the injection sites for 24 hours to reduce the chance of product migration.
Onset and Duration of Gummy Smile Botox Results
Botox effects develop gradually over several days. The effect of Botox for gummy smile is usually observed within one to two weeks.1
Full Botox results develop progressively over days 4-14 after treatment, with natural-looking movement preserved1. The maximum effect is typically achieved by two weeks post-injection.
Duration varies among individuals, but most patients experience results lasting 3-4 months and need maintenance treatments to sustain the outcome.1 The duration of botulinum toxin effect correlates with the amount of toxin applied.
Factors affecting longevity include individual metabolism, muscle strength, injection technique, and dosage. Some patients notice longer-lasting results with subsequent treatments as the muscle gradually weakens over time.
Side Effects, Risks, and How to Lower Them
Botulinum toxin A adverse effects are usually local, mild, transient, and self-limited, typically appearing within days after injection and resolving spontaneously without intervention. Bruising at the injection site is reported in 10-25% of Botox patients, with other common side effects including mild swelling, redness, headache in the first 24-48 hours, and temporary tenderness that typically resolve within a few days to two weeks.
Faulty technique or excessive botulinum toxin A dose can cause unwanted spread leading to ptosis, facial weakness, dysphagia, dysarthria, respiratory complications, and other muscle weakness. These complications highlight the importance of proper anatomical knowledge and conservative dosing.
Asymmetry can occur if injection placement or dosing differs between sides. Because Botox is temporary, this typically resolves as the product wears off, although touch-up treatment may be needed sooner if the asymmetry is pronounced. Another rare but possible complication is speech changes, which occur if the injection unintentionally affects muscles involved in articulation.
To minimize these risks, patients are advised to discontinue aspirin, NSAIDs, and vitamin E for one to two weeks prior to treatment.
Who Benefits Most from Gummy Smile Botox
Ideal candidates have gummy smiles primarily caused by muscle hyperactivity rather than skeletal or dental issues. Botulinum toxin injections are appropriate only for patients with hyperactive upper lip muscles contributing to excessive gingival display; muscle-function analysis during professional evaluation helps determine suitability of this minimally invasive neuromodulator approach versus surgery.
Good candidates should have realistic expectations about temporary results that require maintenance treatments. They should be in good general health without contraindications to botulinum toxin, such as neuromuscular disorders or allergies to the product.
The best outcomes occur in patients who understand that Botox provides subtle improvement rather than dramatic transformation. A comprehensive facial assessment helps determine whether muscle-driven gummy smile will respond well to neuromodulator treatment.
Determine your candidacy with an hour-long evaluation to find out if Botox gummy smile treatment is right for you.
When Surgical Treatment Makes More Sense
When skeletal issues or structural causes such as upper jaw position problems are present, surgical solutions including lip repositioning surgery and orthognathic jaw surgery provide the most predictable and lasting results for gummy smile correction, unlike repeated botulinum toxin injections that require ongoing maintenance.
For gummy smiles caused by vertical maxillary excess, orthognathic surgery to reposition the upper jaw is recommended as the comprehensive long-term solution because it directly addresses the underlying jaw structure.
Altered passive eruption is managed with periodontal crown lengthening and osseous recontouring to restore biologic width, providing a definitive solution where Botox would only address symptoms temporarily. When excess gum tissue covers part of the teeth due to altered passive eruption or gingival hyperplasia, crown lengthening or soft-tissue periodontal procedures are more appropriate than ongoing Botox because they permanently reshape the gumline for proportionate tooth exposure.
Because gummy smiles frequently result from coexisting factors such as jaw position, tooth eruption, gum overgrowth, and lip dynamics, Botox alone often fails to deliver satisfactory results when vertical maxillary excess or significant soft-tissue excess is present.
Choosing a Provider for Natural, Long-Lasting Results
Board certification in dermatology, plastic surgery, or a related specialty, along with specific training in facial anatomy, is recommended to lower the risk of Botox complications.
Ellie Pranckevicius brings unique qualifications to gummy smile treatment, combining her neuroscience ICU background with specialized aesthetic training. Her experience caring for critically ill patients developed exceptional clinical judgment and deep understanding of human physiology that support superior injection technique and complication management.
Mirror Plastic Surgery’s concierge approach ensures comprehensive evaluation rather than rushed consultations. The practice’s safety-first, function-second, and aesthetics-third philosophy aligns closely with the precision required for successful gummy smile treatment.
The hour-long consultation process allows for thorough anatomical assessment, realistic expectation setting, and personalized treatment planning that reflects your unique facial structure and aesthetic goals.
Experience Ellie’s comprehensive approach and discover how anatomical expertise and personalized care make the difference in achieving natural, harmonious results.
Frequently Asked Questions
Can Botox fix a gummy smile permanently?
No, Botox provides temporary improvement lasting 3-4 months on average. The treatment works by temporarily weakening the muscles that elevate the upper lip during smiling. As the botulinum toxin gradually wears off, muscle function returns to baseline, and the gummy smile reappears. Maintenance treatments every 3-4 months are necessary to sustain results. For permanent correction, surgical options like lip repositioning or jaw surgery may be more appropriate depending on the underlying cause.
How many units of Botox are typically used for a gummy smile?
Dosing varies significantly based on individual anatomy, muscle strength, and desired outcome. Most treatments use conservative doses to achieve natural-looking results while preserving normal lip function. The exact number of units depends on factors like facial structure, muscle activity patterns, and previous treatment response. A thorough consultation with anatomical assessment is essential to determine the appropriate dose for your specific situation.
What happens if the injection is placed incorrectly?
Improper injection placement can cause unwanted effects including asymmetry, difficulty speaking, problems with lip movement, or unnatural facial expressions. These complications typically resolve as the Botox wears off over 3-4 months, but they can significantly impact quality of life during that period. This is why choosing an experienced provider with deep anatomical knowledge is crucial. Proper technique, conservative dosing, and precise injection placement minimize the risk of complications.
How soon can I smile normally after treatment?
You can smile immediately after treatment, but the full effect develops gradually over 3-14 days. Initial changes become noticeable within 3-5 days, with peak results achieved by two weeks. During the first few days, your smile may feel slightly different as the muscle activity begins to decrease. Normal facial expressions and lip function are preserved throughout the process, though the degree of lip elevation during smiling will be reduced as intended.
Is gummy smile Botox treatment painful?
Most patients experience minimal discomfort during the procedure. The injections feel like brief pinpricks, and topical numbing cream can be applied beforehand to further reduce sensation. The brief treatment time means any mild tenderness or swelling typically resolves within a few days. Ice can be applied immediately after treatment to minimize swelling and discomfort.
Conclusion
Botox offers an effective, minimally invasive solution for gummy smiles caused by hyperactive upper lip muscles.1 When performed with precise anatomical knowledge and conservative dosing, the treatment provides natural-looking results that soften excessive gum display while preserving normal lip function. The key to success lies in proper patient selection, accurate injection technique, and realistic expectation setting.
While Botox provides excellent temporary improvement for muscle-driven gummy smiles, patients also benefit from understanding when surgical alternatives may be more appropriate for skeletal or dental causes. A comprehensive evaluation by an experienced provider ensures you receive the most suitable treatment recommendation for your specific anatomy and aesthetic goals.
Mirror Plastic Surgery’s commitment to thorough assessment, evidence-based treatment planning, and personalized care provides the foundation for achieving natural, harmonious results that enhance your confidence while maintaining facial function and expression.
Disclaimer: Results may vary from person to person. Editorial content, before and after images, and patient testimonials do not constitute a guarantee of specific results.
1 Results may vary from person to person. Editorial content, before and after images, and patient testimonials do not constitute a guarantee of specific results.
