Botulinum toxin in the treatment for hyperhidrosis or excessive perspiration

Botulinum toxin is a product which is used in many fields of medicine. In aesthetic medicine, it is used in the treatment of wrinkles and in the case of excessive perspiration, which is called hyperhidrosis.
Botulinum toxin is a paralysing agent which is naturally produced by the bacteria Clostridium botulinum. It blocks nerve action in the muscles, which thus stops them from contracting. In the case of excessive perspiration, it also blocks the secretion of perspiration within the sweat glands.
Hyperhidrosis is a debilitating problem in everyday life, which makes socioprofessional relationships difficult. In the case of localised hyperhidrosis, botulinum toxin may be a suitable treatment, when other methods (local antiperspirants, ion therapy) have failed. Dr Thomet will advise you on the most appropriate treatment for you.

  • You have excessive perspiration in the palms of your hands, the soles of your feet and/or your underarms
  • You need to change clothes several times a day because of excessive perspiration
  • You avoid shaking hands because of your excessive perspiration
  • You have skin problems on the soles of your feet
The first consultation

The first consultations with Dr Thomet will allow you to get to know your surgeon, to discuss your situation and your wishes with her. In order to fill in your medical file, she will ask you about your medical history, any operations you may have had before, as well as a list of any medication you may be on and any allergies you may have.
She will carry out a physical exam and take measurements and in some cases photos, which will remain confidential and be used only in connection with your medical records.
At the end of the consultation, Dr Thomet will give her diagnosis and tell you if you are a good candidate for Botox injections. She will explain the technique she plans to use and the risks of complications. A second consultation will be scheduled for the injections. You will be provided with an estimate after the first consultation.


Basic health insurance does not cover botulinum toxin in the treatment of hyperhydrosis. However, certain supplementary health insurances may refund part of the treatment. In this case, a prior request can be drawn up.

The injections

The injection is done with a small syringe. Several injections can be required depending on the areas to be treated.


The anti-perspiration effects of botulinum toxin are not immediate and may take around a week for a result of an 80 to 90% reduction in perspiration. The maximum effect can last up to 10 months. As a general rule, there should be a gap of 12 months between sessions.

Side effects

The adverse side effect is the pain of the injection, especially in the palms of the hands and the finger pads. Local topical anaesthetics (creams which can be applied to the skin) are not effective and the injections are not totally risk-free. However, the treatment is bearable if the injection is done slowly and if ice packs are applied.