[Botulinum toxin in the treatment of pain].

Botulinum toxin (BTx) has been administered for many years in the treatment of dystonias with great success. Its effectiveness is comparable with the best drugs. It was observed during spasmodic torticollis treatment that pain disappears as first before clinical improvement of dystonia. Different mechanisms of influence of BTx on pain are discussed. BTx was tried in tension headache, cluster headache, migraine, fibromyositis, painful cramps with varying results. It is possible that BTx will be useful in many other types of pain.