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BOTULINUM TOXIN FOR FROWN LINES : REVIEWS

Last updated : 12 June 2026

Frown lines are among the first visible signs of ageing in the upper third of the face. They result from repeated contraction of the corrugator supercilii and procerus muscles, responsible for the vertical crease between the eyes. Associated with anger, fatigue or concentration, they can make the eyes look older and give a stern appearance, even at rest.
Botulinum toxin injections are now the reference treatment for smoothing this area non-invasively. But how effective are they really ? What do patients say ? Are the results natural, lasting and satisfactory ? This text provides a detailed, clinical and objective analysis of patient feedback on botulinum toxin treatment for frown lines.

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Why are frown lines so pronounced and early to appear ?

A frown line is a dynamic expression line : it depends not only on skin ageing but primarily on repeated muscle activity in the glabella. Unlike static wrinkles caused by collagen loss, frown lines often appear in the thirties, or even earlier in very expressive patients.
The muscular origin of this wrinkle explains the value of botulinum toxin : by inhibiting neuromuscular transmission, it relaxes the muscles responsible for tension. This allows the skin around the glabella to relax progressively, with a noticeable and often striking smoothing effect.

Patient reviews after botulinum toxin injections for frown lines

Feedback is overwhelmingly positive, particularly among patients discovering this treatment. Frequently reported effects include :

  • A visible reduction in the wrinkle within the first week, with optimal smoothing after 10 to 14 days.
  • A more relaxed, less stern expression while maintaining facial mobility.
  • Eyes that appear more open and rested, reducing signs of fatigue or tension.
  • Very good treatment tolerability, without significant side effects.

Patients also emphasise that results are gradual, subtle and reversible, contributing to high satisfaction. For many, botulinum toxin in this area becomes a regular maintenance treatment within their aesthetic medical routine.

How long do the effects last according to reviews ?

Botulinum toxin treatment for frown lines lasts an average of 4 to 6 months. Some patients notice movement gradually returning from the third month, while others retain the benefits for up to 7 months, particularly during initial sessions or with moderate muscle activity.
The return of wrinkles is neither abrupt nor unusual : botulinum toxin wears off gradually without leaving a trace. Many patients therefore schedule maintenance sessions two to three times a year to maintain the result.
Clinical observations and patient experience also show a cumulative effect : over successive sessions, the muscle tends to contract less intensely and the wrinkle deepens more slowly, sometimes becoming less pronounced over the longer term.

When do results become visible ?

Most patients notice improvement from the 3rd or 4th day, with optimal results between the 7th and 14th day. This gradual development is often reassuring : it avoids an overly abrupt change and allows facial expression to adapt naturally.
A follow-up consultation around the 15th day is generally recommended to assess the result, check symmetry and, if necessary, perform a targeted touch-up where the response is partial. Patients particularly appreciate this systematic, personalised follow-up as an additional assurance of thoroughness and quality.

Does botulinum toxin for frown lines create a frozen appearance ?

Fear of a frozen appearance is a recurring concern among new patients, who worry about an immobile forehead or artificial-looking eyes. In practice, this risk is extremely low when injections are performed by an experienced doctor.
Feedback shows that botulinum toxin provides targeted relaxation without blocking expressions. The key lies in appropriate dosing, detailed knowledge of facial anatomy and precise mapping of injection points.
Well-performed treatment respects the natural movement of the eyes and eyebrows. Frown lines can therefore be softened or even smoothed away without changing facial personality or dynamics.

Is botulinum toxin effective on an already pronounced frown line ?

For dynamic wrinkles (visible only during contraction), the effect is often striking. For a wrinkle already visible at rest, particularly in patients over 45, botulinum toxin relaxes the muscles but is not always enough to eliminate the static crease completely.
In these cases, the best results come from a combined approach : botulinum toxin injections to relax the muscle and light filling with hyaluronic acid injections to correct the skin crease.
Many patients confirm that this two-stage protocol produces visible, natural and harmonious improvement.

Side effects in patient reviews : what do they report ?

Reported side effects are rare, minor and temporary : slight redness, tenderness at the injection site for a few hours, or localised tension during the first few days. These resolve quickly without lasting effects.
Serious complications (eyebrow ptosis, lasting asymmetry) are exceptional and almost always avoidable when injections are performed by an experienced doctor.
Reviews confirm that most patients experience no discomfort after injections, can resume activities immediately and find the procedure quick, painless and discreet.

Reviews of first injections and maintenance injections 

First injections often cause understandable apprehension, quickly replaced by enthusiasm as the initial results emerge. Botulinum toxin then feels like a reassuring discovery, far removed from stereotypes of frozen faces. Among patients already familiar with treatment, feedback is more measured but reflects consistent satisfaction, with a clear preference for regular care rather than allowing the wrinkle to return.
Experience shows that botulinum toxin treatment for frown lines naturally becomes part of a well-managed aesthetic routine over time. Its gradual, reversible nature makes it a valuable tool for supporting facial ageing gently, precisely and flexibly.

What do patients think of the cost-benefit ratio ?

Many patients initially question the value of a treatment that needs repeating. However, after a satisfactory first session, the investment is often considered justified and reasonable given the visible result, simplicity of the procedure and comfort achieved.
Reviews emphasise reliable results and an absence of troublesome side effects. Some patients consider botulinum toxin one of the most effective and safest aesthetic medical procedures they have experienced.

Feedback from loved ones : a decisive factor in the final opinion

Patients often mention feedback from those around them. Loved ones generally notice an improvement without necessarily recognising an aesthetic procedure. They describe a “healthy glow”, a “rested face” or a “relaxed expression”. For patients, these comments confirm successful treatment : appearance improves without revealing its cause.
Satisfaction therefore stems from the balance achieved : a visible yet discreet result, effective without being ostentatious.

Why are frown lines often the first indication for botulinum toxin ?

Clinical data and doctors' experience agree on one point : for many patients, frown lines provide an initial introduction to aesthetic medical procedures. Common, often early, highly expressive and perceived as unattractive, they attract attention and cause real discomfort. Treatment is quick and well-established, with results appearing within days and providing clear improvement without radical transformation.
For new patients, this reassuring first experience demonstrates how natural the effects can be. A positive introduction to botulinum toxin often encourages broader consideration of other treatments, always through a measured, gradual approach. Frown lines therefore represent both an aesthetic indication and an educational step, helping patients approach aesthetic medicine with confidence.

Medical studies on patient satisfaction after botulinum toxin injections for frown lines 

Clinical studies published over the past two decades confirm very high patient satisfaction after botulinum toxin treatment for frown lines. Among the reference publications, a multicentre study published in Dermatologic Surgery assessed more than 500 patients treated for glabellar lines : over 90 % reported significant aesthetic improvement, with visible results within the first week and peak satisfaction around the second week after injections. Other studies, particularly in Journal of Cosmetic and Laser Therapy, found that patients reported subjective improvements in self-esteem and emotional well-being beyond the skin benefits alone. These findings are consistent with clinical feedback : botulinum toxin in the glabella delivers reproducible results and an extremely low complication rate. These observations echo clinical practice : glabellar botulinum toxin provides reproducible results with an extremely low complication rate. This scientific consensus adds further legitimacy to the many positive patient reviews.

Dr Valeria Romano

Article written by Dr Valeria Romano

Dr Valeria Romano supports each patient with a comprehensive approach to the aesthetics of the face, body and intimate areas, and to 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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