Botulinum Toxin — Questions for a Specialist, Effects, Indications and Safety

Series: Questions for a specialist · Answers: editorial material based on medical knowledge and source materials · Medical review: Piotr Rak, MD, PhD — pending authorisation before publication · Publication: to be completed · Updated: 9 July 2026

This article is educational and does not replace a medical consultation. Botulinum toxin is a medicinal product, and its use requires eligibility assessment, dose selection, exclusion of contraindications and discussion of possible adverse effects.

Key information at a glance

• Botulinum toxin type A temporarily weakens selected muscles or blocks specific nerve transmission.
• In aesthetic medicine, it is most commonly used for facial expression lines: frown lines, forehead lines and crow’s feet.
• It may also be used for selected medical indications, including axillary hyperhidrosis and chronic migraine, but appropriate assessment is required.
• Bruxism and gummy smile are uses that require careful discussion; they are often off-label and are not suitable for every patient.
• The effect is temporary and is usually measured in months, but it depends on the dose, treatment area, product and individual response.
• The most common adverse effects after injections include bruising, tenderness, swelling, headache or temporary asymmetry.
• A good result does not mean a “frozen face”; the aim is to tailor the dose to the patient’s anatomy and facial expression.

Is the “questions for a specialist” format good for SEO and AI?

Yes, provided the text does not pretend to be a fictional interview. The Q&A format responds well to real patient intentions: “Does Botox hurt?”, “How long does botulinum toxin last?”, “Does Botox help with bruxism?” and “Is Botox safe?”. These are questions that appear in search engines, AI Overviews and conversations with patients.

To make this format consistent with E-E-A-T, it is worth clearly showing who is responsible for the content, who medically reviews it, when it was updated and which sources it is based on. It is best not to create direct quotations from a doctor without authorisation; instead, one can use wording such as: “Expert answer, pending medical authorisation by a doctor”.

Doctor, what exactly is botulinum toxin?

Botulinum toxin type A is a substance used in medicine in strictly controlled, very small doses. It works by temporarily inhibiting the transmission of nerve signals to a muscle or gland. In aesthetic medicine, this is used mainly to reduce the activity of facial muscles responsible for dynamic wrinkles.

The colloquial word “Botox” is often used as a synonym for botulinum toxin, although formally Botox is the trade name of one product. Different authorised botulinum toxin products are used in medical practice, and the choice of product and dose is made by the doctor.

Does botulinum toxin “freeze the face”?

It does not have to. The effect depends on the dose, injection site, patient anatomy, muscle strength and the experience of the person performing the procedure. Too high a dose or incorrect injection points may cause reduced facial expression, heaviness of the eyebrows, asymmetry or an unnatural appearance.

With appropriately selected treatment, the goal is usually not to completely immobilise the face, but to reduce excessive activity of selected muscles. Eligibility assessment therefore includes evaluation of facial expression, eyebrow and eyelid position, asymmetry and patient expectations.

Is botulinum toxin only used for wrinkles?

No. Botulinum toxin has both aesthetic and medical uses. In aesthetic medicine, it is used mainly to reduce facial expression lines. In therapeutic medicine, it may be used in selected neurological conditions, chronic migraine or hyperhidrosis, depending on the indication, product authorisation and patient eligibility.

Not every use of botulinum toxin has the same level of scientific evidence. This article therefore distinguishes classic aesthetic indications from therapeutic and off-label uses.

Which areas are most commonly treated with botulinum toxin in aesthetic medicine?

The most common treatment areas are those in which wrinkles are caused mainly by facial muscle activity. Classic areas include:

• frown lines between the eyebrows,
• horizontal forehead lines,
• crow’s feet around the eyes,
• cobblestone chin, caused by excessive activity of the mentalis muscle,
• lifting or stabilising selected parts of the eyebrows in appropriately selected patients,
• vertical neck bands, if the anatomy and indications allow.

Not every area is suitable for every patient. For example, in people with low-set eyebrows or excess eyelid skin, incorrect forehead injections may increase the feeling of heavy eyelids.

How long does botulinum toxin work?

In aesthetic applications, the effect usually begins to appear after a few days, and a fuller assessment is most often made after approximately 10–14 days. The effect usually lasts several months, often around 3–6 months, but this depends on the product, dose, area, patient metabolism, muscle activity and treatment frequency.

The procedure should not be repeated too early without an indication. Treatments that are too frequent or poorly planned may increase the risk of adverse effects or an unsatisfactory result.

How does botulinum toxin work in chronic migraine?

Botulinum toxin type A is used to prevent chronic migraine in patients with very frequent headaches. It is not a treatment for an ordinary headache or a one-off treatment for a migraine attack. Eligibility usually requires a diagnosis of chronic migraine, assessment of previous treatment and exclusion of other causes of symptoms.

NICE guidance recommends botulinum toxin type A as a preventive option for adults with chronic migraine, defined as headaches on at least 15 days per month, including at least 8 migraine days, after failure of at least three previous preventive therapies and appropriate management of medication overuse.

In practice: a patient with migraine should be managed according to a neurological pathway. If the clinic provides toxin treatment for this indication, the scope of the service, eligibility criteria and responsible doctor should be clearly described on the website. If not, it is better to state that chronic migraine requires a neurological consultation.

Does botulinum toxin help with bruxism?

Bruxism, meaning clenching or grinding the teeth, may cause pain in the masseter muscles, overloading of the temporomandibular joints, headaches and tooth wear. Botulinum toxin is sometimes injected into the masseter muscles to reduce excessive tension.

This should be discussed cautiously: botulinum toxin may help selected patients, particularly by reducing pain and muscle tension, but it is not suitable for everyone and does not replace full dental, physiotherapy or causal assessment. The scientific evidence in this area is still being evaluated, and some reviews emphasise limited certainty of the findings.

Before treatment, it is worth assessing the bite, muscle tension, temporomandibular joint, stress, sleep, medication and the possible need for an occlusal splint or physiotherapy.

What is a gummy smile and when may botulinum toxin help?

A gummy smile means excessive exposure of the gums when smiling. Possible causes include overactivity of the muscles lifting the upper lip, jaw anatomy, lip length, tooth position or an orthodontic problem. Botulinum toxin may be considered when excessive muscle activity is the main cause.

Not every gummy smile is suitable for treatment with botulinum toxin. For some patients, dental, orthodontic, periodontal or surgical consultation is more appropriate. The effect of the toxin is temporary and depends on the dose and the patient’s anatomy.

Does botulinum toxin help with excessive sweating?

Yes, botulinum toxin may be used to treat hyperhidrosis, especially axillary hyperhidrosis. It works by temporarily blocking the nerve signals that stimulate sweat glands. In practice, it may reduce sweating in the treated area, but the effect is temporary and treatment needs to be repeated.

Official indications depend on the specific product and the country of authorisation. BOTOX documentation includes severe primary axillary hyperhidrosis that is inadequately controlled with topical treatment. For the hands, feet or face, the risk of adverse effects should be discussed particularly carefully, such as hand muscle weakness when treating palmar hyperhidrosis.

The Wyspa Medycyny Przyjaznej price list includes treatment of hyperhidrosis with botulinum toxin. The current scope, treatment areas and price should be confirmed during registration.

Is botulinum toxin safe?

Botulinum toxin has been used in medicine for many years, but it remains a medicinal product that must be used responsibly. Safety depends on patient assessment, the product, dose, injection technique, anatomical knowledge and control of contraindications.

It should not be stated that the toxin “acts only locally and does not spread through the body”. Botulinum toxin products include warnings about the possibility of the toxin’s effect spreading beyond the injection site, although serious adverse effects are rare when the product is used correctly at appropriate doses. Patients should know when to seek urgent help for symptoms such as difficulty breathing, swallowing or speaking, generalised weakness or an allergic reaction.

Possible adverse effects after botulinum toxin

The most common symptoms after injection are usually local and temporary, but patients should also be aware of rarer risks.

• bruising, redness, swelling or tenderness at the injection site,
• headache or a feeling of tension,
• temporary asymmetry,
• drooping of the eyelid or eyebrow,
• excessive weakness of muscles in the treated area,
• dry eye or tearing, depending on the area,
• difficulty chewing after masseter treatment if the dose or patient response is too strong,
• hand muscle weakness after treatment of palmar hyperhidrosis,
• allergic reaction, very rarely,
• symptoms requiring urgent help: difficulty breathing, swallowing or speaking, or generalised weakness.

Who should not receive botulinum toxin?

Contraindications and situations requiring caution are assessed individually by the doctor. The most important include:

• pregnancy and breastfeeding,
• active skin infection at the planned injection site,
• hypersensitivity to ingredients of the product,
• certain neuromuscular diseases,
• a history of significant swallowing or breathing disorders if these may increase the risk,
• medications affecting neuromuscular transmission,
• unrealistic expectations or a desire to undergo treatment under pressure from others.

Before treatment, patients should inform the doctor about medication, chronic diseases, allergies, previous reactions to botulinum toxin and procedures in the same area.

How should I prepare for the procedure?

Preparation depends on the indication and treatment area. During the consultation, the doctor may recommend:

• providing information about all medications and supplements,
• avoiding alcohol before the procedure if advised by the doctor,
• not scheduling important events immediately after the procedure because of possible bruising or temporary asymmetry,
• postponing treatment in the event of infection, fever or active skin lesions,
• bringing medical records if the toxin is to be used for therapeutic reasons.

Anticoagulants, antiplatelet medication or other long-term medication should not be stopped without consulting the treating doctor.

What does the procedure look like step by step?

1. Consultation: the doctor assesses indications, contraindications, facial expression, anatomy and expectations.
2. Planning injection points: the areas, dose and treatment symmetry are determined.
3. Skin disinfection: the area is prepared for injection.
4. Product administration: the toxin is injected with a fine needle at selected points.
5. Recommendations: the patient receives instructions about what to avoid after treatment and when to attend a follow-up.

The Wyspa Medycyny Przyjaznej website states that botulinum toxin is administered by Piotr Rak, MD, PhD, and that the typical treatment time for aesthetic indications is approximately 10–15 minutes. Details depend on the treatment area and indication.

What should be avoided after botulinum toxin?

Recommendations may vary depending on the area and product, but the doctor usually discusses:

• avoiding massage of the injection sites immediately after treatment,
• not planning strenuous physical activity immediately after treatment,
• avoiding saunas, hot baths and alcohol for the period specified by the doctor,
• not lying down or applying pressure to the treated area for the period recommended at the clinic,
• monitoring unusual symptoms and reporting them to the doctor.

The patient receives precise instructions after the procedure. Therapeutic uses may require separate recommendations and follow-up.

Considering botulinum toxin?

The most important factors are eligibility assessment, the correct dose and a realistic plan — without a “mask-like” effect and without promises that cannot be fulfilled.

Botulinum toxin at Wyspa Medycyny Przyjaznej in Gdańsk

At Wyspa Medycyny Przyjaznej in Gdańsk, botulinum toxin treatment is performed by Piotr Rak, MD, PhD. The service page lists the most common aesthetic areas: the forehead, frown lines, crow’s feet and the area around the mouth, as well as the approximate onset and duration of effect.

The current scope of indications, prices, available products, eligibility for hyperhidrosis treatment and any therapeutic uses should be confirmed during registration or consultation.

View the procedure page Aesthetic medicine price list

FAQ — botulinum toxin

Is botulinum toxin the same as Botox?

“Botox” is a colloquial name used for botulinum toxin, although formally Botox is the trade name of one product. Clinics use various authorised botulinum toxin products.

When is the effect of botulinum toxin visible?

The first effects usually appear after a few days, and a fuller assessment is most often made after approximately 10–14 days. The speed of onset may vary between patients.

How long does the effect last?

Usually several months, often around 3–6 months in aesthetic applications. Duration depends on the product, dose, treatment area, muscle activity and individual response.

Does botulinum toxin help with migraine?

It may be used to prevent chronic migraine in appropriately selected adult patients. It is not a treatment for an ordinary headache or an acute migraine attack. Diagnosis and eligibility assessment are required, often by a neurologist.

Does botulinum toxin work for bruxism?

In selected patients, it may reduce masseter tension and pain, but it is not suitable for everyone. Bruxism assessment should also consider the bite, temporomandibular joints, stress, sleep and the need for physiotherapy or an occlusal splint.

Does botulinum toxin help with hyperhidrosis?

Yes, it may reduce sweating in the treated area by temporarily blocking stimulation of the sweat glands. A particularly well-described indication is severe primary axillary hyperhidrosis when topical treatment is insufficient.

Can botulinum toxin make someone look unnatural?

Yes, if the dose, injection points or eligibility assessment are inappropriate. The procedure should therefore be performed by a doctor who understands facial anatomy and can tailor the effect to the patient’s facial expression and expectations.

Is botulinum toxin suitable for everyone?

No. Contraindications may include pregnancy, breastfeeding, active infection at the injection site, hypersensitivity to product ingredients, certain neuromuscular diseases or other factors assessed during the consultation.

Who performs botulinum toxin treatment at Wyspa Medycyny Przyjaznej?

The Wyspa Medycyny Przyjaznej website states that botulinum toxin treatment is performed by Piotr Rak, MD, PhD. Current availability and the scope of indications should be confirmed during registration.

Sources for medical and editorial verification

• Google Search Central, Creating helpful, reliable, people-first content: https://developers.google.com/search/docs/fundamentals/creating-helpful-content
• Google Search Quality Rater Guidelines, YMYL and medical expertise: https://guidelines.raterhub.com/searchqualityevaluatorguidelines.pdf
• Wyspa Medycyny Przyjaznej, botulinum toxin administration: https://www.wyspamedycynyprzyjaznej.pl/en/podanie-toksyny-botulinowej
• Wyspa Medycyny Przyjaznej, Dr Piotr Rak: https://www.wyspamedycynyprzyjaznej.pl/en/dr-piotr-rak
• Wyspa Medycyny Przyjaznej, aesthetic medicine price list: https://www.wyspamedycynyprzyjaznej.pl/en/cennik-medycyna-estetyczna
• NICE, Botulinum toxin type A for the prevention of headaches in adults with chronic migraine: https://www.nice.org.uk/guidance/ta260
• American Migraine Foundation, Botox for Migraine: https://americanmigrainefoundation.org/resource-library/botox-for-migraine/
• AbbVie, BOTOX prescribing information: https://www.rxabbvie.com/pdf/botox_pi.pdf
• American Academy of Dermatology, Botulinum toxin therapy FAQs: https://www.aad.org/public/cosmetic/wrinkles/botulinum-toxin-faqs
• Coelho MS et al., Botulinum Toxin for Bruxism: An Overview, PMC: https://pmc.ncbi.nlm.nih.gov/articles/PMC12115368/
• Buzatu R et al., Efficacy and Safety of Botulinum Toxin in the Management of Sleep Bruxism, PMC: https://pmc.ncbi.nlm.nih.gov/articles/PMC11203296/