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Botulinum toxin and facial expressions

Dernière mise à jour : 3 June 2026

Botulinum toxin is among the most popular aesthetic treatments for expression lines and facial rejuvenation. However, prospective patients often ask: “Will I still smile naturally afterwards?” This concern stems from the misconception that it freezes the face and prevents natural expression. This article addresses that concern, explaining its action, impact on expression and why properly performed treatment preserves a natural smile.

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Can you still smile naturally after botulinum toxin injections?

Botulinum toxin is among the most popular aesthetic treatments for expression lines and facial rejuvenation. However, prospective patients often ask: “Will I still smile naturally afterwards?” This concern stems from the misconception that it freezes the face and prevents natural expression. This article addresses that concern, explaining its action, impact on expression and why properly performed treatment preserves a natural smile.

Botulinum toxin: its action and benefits

A purified neurotoxin, it temporarily blocks signals regulating muscle activity. Relaxing muscles causing forehead lines, crow's feet and frown lines smooths skin and visibly reduces wrinkles without surgery.
Botulinum toxin also treats primary axillary hyperhidrosis.
Contrary to misconceptions, it does not “paralyse” the face. Correctly injected by an experienced doctor, it targets only wrinkle-producing muscles, preserving others, particularly those involved in positive expressions such as smiling.

Preventive botulinum toxin

Debunking the “frozen face” myth. A widespread myth claims it leaves the face frozen and expressionless. This often reflects incorrect injections, excessive doses or wrong sites. An experienced doctor uses precise doses and suitable techniques for natural results, opening the eyes and creating a brow lift  : treating frown lines and crow's feet induces slight brow lifting. However, brow lifting itself is not an indication for botulinum toxin.
Careful injections target only relevant wrinkle muscles, leaving smiling and other natural-expression muscles intact. After well-performed treatment, you can smile, laugh and express emotion as before.
It is also injected to prevent static wrinkles, known as Baby botulinum toxin.

Botulinum toxin and facial expressions: can you still smile?

There is no single answer to “at what age should botulinum toxin injections begin?”. The ideal starting time actually depends on several factors.

  • Genetics: genetics plays a major role in wrinkle formation.
  • Lifestyle: environmental factors and habits also influence wrinkles. Smoking, excessive sun exposure, insufficient sleep and an unbalanced diet can all accelerate ageing.
  • Skin type: people with thin skin are often more prone to wrinkles than those with thicker, oilier skin.
  • Frequency of facial expressions: particularly expressive people develop dynamic wrinkles faster.

Why do some people look “frozen” after botulinum toxin?

Frozen-looking faces often result from poor technique or excess product. Contributing factors include:

  • Poor injection technique: millimetre precision is needed. Wrong muscles or sites can impair movement beyond intended effects. An experienced injector knows exactly where and how much for perfect, natural results.
  • Overdosing : excessive doses over-relax muscles, temporarily limiting expression. An experienced doctor adjusts doses to individual needs and expectations to avoid this.
  • Poor planning: mechanical treatment without analysing individual anatomy can produce inappropriate results. Choose a competent doctor who carefully plans and adapts each treatment.

How can natural results be ensured after treatment?

Choose a qualified, experienced doctor: this is crucial for natural results. An experienced injector understands detailed anatomy and individual adjustment.
Follow aftercare: medical instructions maximise results and reduce complications.
Schedule regular maintenance: effects generally last 5 to 6 months. Regular sessions maintain results.

Is smiling naturally after botulinum toxin possible?

Injected by an experienced doctor, botulinum toxin does not prevent smiling or natural expressions. It can improve overall appearance by smoothing wrinkles while preserving expressiveness and leaving the smile unchanged.

Dr Valeria Romano

Article written by Dr Valeria Romano

Dr Valeria Romano supports each patient through a comprehensive approach to facial, body and intimate aesthetics, as well as skin and hair quality. Every treatment is based on a personalised medical assessment.

Learn more about Dr Valeria Romano
Contact Dr Valeria Romano : +41 78 209 02 89 dr.romano.valeria@gmail.com

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