[Beta-endorphin levels in patients with pain syndromes in the areas of the face and head].

Blood plasma beta-endorphin concentrations were measured in 87 patients with various facial and head pain syndromes: trigeminal neuralgia or neuropathy Horner syndrome and migraine, facial autonomic pains. beta-endorphin concentrations were measured before and after treatment. In the groups under investigation, the neuropeptide showed opposite changes in plasma levels after the therapy depending on the type of the syndrome.