[Botulinum toxin in otorhinolaryngology - an update].

During recent decades, the clinical use of botulinum toxin has become increasingly well established. In the field of otorhinolaryngology there are many indications for which botulinum toxin can improve patients' quality of life. These include applications in the region of the head and neck muscles and the autonomic nervous system in patients suffering from movement disorders of special muscles and secretory disorders (salivary, lacrimal, and sweat glands). The present article presents an overview of well-established and new indications for application of botulinum toxin in the head and neck region.