Gummy Smile Botox: Gum Show Correction Guide 2026

A gummy smile describes excessive gum show when smiling. In many patients the reason is not the teeth themselves, but overactive upper-lip elevator muscles that lift the lip too high during expression.

When that is the real cause, Botox can be a quick non-surgical way to soften gum display and create a more balanced smile without changing the natural character of the face.

1. What Causes a Gummy Smile?

Not every gummy smile has the same anatomy. Some patients have a short upper lip, some have altered tooth eruption or gingival excess, and some mainly have hyperactive lip-lifting muscles.

That distinction matters because Botox only helps when muscle overactivity is a meaningful part of the problem. If the main cause is dental, periodontal, or skeletal, another treatment path may be more appropriate.

• upper-lip elevator hyperactivity is a common cause
• gum excess and tooth position can mimic the same look
• good diagnosis matters more than the injection itself

2. How Gummy Smile Botox Works

Small botulinum toxin doses are placed into selected upper-lip elevator muscles so they contract less aggressively when the patient smiles. This limits upward lip pull and reduces visible gum exposure.

The intention is not to paralyze the smile. A good result keeps the expression friendly and natural while reducing excessive gingival show.

• the procedure is quick and usually well tolerated
• results typically begin in several days
• full effect is usually judged around two weeks

3. How Long It Lasts and Who Is a Good Candidate

In many patients the visible result lasts around 3 to 4 months, after which muscle activity gradually returns and maintenance can be discussed. Some patients notice longer intervals with repeated careful treatment.

The best candidates are adults with visible gum show during smiling who want a non-surgical option and whose evaluation suggests muscle hyperactivity rather than a primarily dental or skeletal cause.

• most useful for dynamic gum show
• pregnancy, breastfeeding, active infection, or neuromuscular disease may require postponement
• maintenance is usually necessary because the effect is temporary

4. When Botox Is Not the Whole Answer

If the smile is driven by gingival hypertrophy, altered passive eruption, or vertical maxillary excess, dental contouring, orthodontics, or maxillofacial planning may be more relevant than toxin alone.

That is why I often treat gummy smile as a diagnosis question first. Botox is an excellent option for the right patient, but not every patient has a Botox problem.

• muscle-related cases respond best
• periodontal or skeletal causes need a different plan
• combination care with dentistry can be appropriate