Botulinum toxin for wrinkles: effects, duration and risks

In everyday language, a brand name has become established as a collective term for an entire class of treatments. Medically speaking, this refers to botulinum toxin, a prescription-only medicine that specifically targets facial muscles. This article explains what happens during the procedure, which wrinkles it is used to treat, how long the effects last and what risks are involved.

Key points at a glance

• Botulinum toxin is a prescription-only medicine that temporarily blocks the transmission of signals between nerves and muscles. As a result, the treated muscle becomes weaker.
• It is effective for wrinkles caused by facial expressions. Wrinkles that remain visible even when the face is relaxed respond only to a limited extent.
• The effect does not set in immediately and lasts for a limited time. Afterwards, muscle activity returns to normal.
• The treatment requires precise anatomical knowledge. Side effects occur primarily when the active substance reaches neighbouring muscles.

What botulinum toxin is and what the umbrella term refers to

Botulinum toxin is a protein produced by bacteria and used as a medicine in a highly diluted, pharmaceutically processed form. It has been in use in medicine for decades, including for muscle spasms and certain movement disorders, chronic migraine, excessive underarm sweating and certain bladder dysfunction. Aesthetic use is just one of several areas of application.

In Germany, several botulinum toxin preparations are authorised for aesthetic use. They differ in composition and authorisation, and their dosage units are not identical, meaning they are not readily interchangeable. When people talk about this type of wrinkle treatment in everyday conversation, they usually mean the treatment category, not a specific product.

The authorisation covers specific areas of the upper third of the face. If treatment is carried out in other areas, this falls outside the scope of the authorisation. Patients must be informed of this by a doctor.

All these preparations are available on prescription only. Prescription-only medicines may only be dispensed on the basis of a prescription from a doctor, dentist or veterinary surgeon. For aesthetic applications, this means that they should be administered by a doctor, not in cosmetic clinics without medical supervision.

How the treatment works and which wrinkles it targets

For a muscle to contract, a nerve transmits a signal with the help of a neurotransmitter. Botulinum toxin blocks this transmission at the treated site. As a result, the muscle contracts less strongly, the overlying skin becomes less creased, and the wrinkle is less prominent.

This determines where the method is effective and where it is not. Expression lines are caused by repeated muscle movement and are particularly visible when frowning, squinting or tensing the forehead. They are the classic area of application, typically in the upper third of the face.

Static wrinkles, on the other hand, remain visible even when the face is completely relaxed. They are caused by loss of volume, skin ageing and gravity – factors that muscle relaxation cannot eliminate. Over the years, the two types merge, as skin that has been repeatedly creased can, over time, develop into a permanent line. The only way to determine which type predominates in your case is by examining your face both at rest and in motion; this cannot be assessed from a photograph alone.

When the effect sets in and how long it lasts

The effects are not immediate. Initial changes usually become apparent within one to two days. According to study data, the full effect can generally be expected after around three to ten days. It is only possible to assess whether an adjustment is necessary once the full effect has been achieved. The treating practice will determine when a follow-up appointment is appropriate.

The duration of effect is limited because the body restores signal transmission. For the areas of the upper face examined in studies, durations of around three to five months are predominantly reported, although the range varies considerably from person to person. Factors influencing this include the treated area, muscle activity, individual circumstances and the amount used. Information found online refers to average values and says little about individual cases.

Once the swelling has subsided, muscle activity returns to normal. The idea that the face will look worse afterwards than it did before is not true.

What risks and side effects are there?

Temporary reactions at the injection sites are common: slight redness, small bruises, swelling or tenderness. Headaches may also occur in the first few days.

The typical side effects arise because the active ingredient also affects neighbouring muscles. Depending on the area treated, this may result in a lowered eyebrow, a drooping upper eyelid, asymmetry or a change in the smile. Such effects are distressing, but are just as temporary as the desired effect. How frequently they occur depends largely on the practitioner’s experience.

Botulinum toxin is not used, amongst other things, in cases of certain disorders of the muscles and neuromuscular signalling, in the event of inflammation in the treatment area, in cases of known intolerances, or during pregnancy and breastfeeding. In cases of blood clotting disorders and when taking anticoagulant medication, there is an increased risk of bruising. Other medications may also affect the treatment’s efficacy, which is why a complete list of medications should be provided during the preliminary consultation.

Why medical experience makes all the difference

The key aspect of the procedure lies not in administering the injection, but in the assessment that precedes it. The facial muscles responsible for facial expressions vary from person to person; muscles work against one another, and neighbouring structures are closely situated. Where treatment is administered and where it is deliberately avoided is determined by this anatomy and by observing your facial expressions in motion.

This also includes the question of whether the method is even suitable for your specific concern. In cases of predominantly static wrinkles or changes caused by volume loss, muscle relaxation will not produce the desired result. A reputable consultation will state this openly and suggest alternatives or advise against the procedure.

Careful treatment also involves providing information about risks and alternatives, a documented medical history and a follow-up appointment. If you are looking for a surgery, it is worth checking which services are actually offered. Find aesthetic medicine practitioners near you

Frequently Asked Questions

When will the effects be noticeable?

The first signs of change usually appear within one to two days, with the full result generally evident after around three to ten days. It is not possible to assess beforehand whether an adjustment would be advisable.

What happens if you do not seek follow-up treatment?

Muscle activity returns, and facial expressions are as they were before. There is no deterioration compared with the initial condition and no dependence on the treatment.

Can the face be permanently altered?

The effect of the medicine itself is temporary. With frequent use over a prolonged period, a treated muscle may lose volume. Studies show that this largely reverts to normal once treatment has ended. There is no evidence of any permanent change in facial expressions as a result. It is nevertheless advisable to consult a doctor regarding the frequency and extent of treatment.

Is the treatment painful?

Very fine needles are used; most patients describe a brief prick. Anaesthetic is not usually required.

Classification

Botulinum toxin is a well-studied medicinal product with a clearly defined scope of application: wrinkles caused by facial expressions. Its effects are temporary, it requires a precise assessment of the individual’s anatomy, and it is not the appropriate method for every condition.

Whether this is an option for you will be determined during a consultation with a doctor, including a physical examination. View Aesthetic Medicine Practitioners by Region