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	It has not yet been entirely clarified, what the causes for migraine are. They seem to be manifold and probably of biological nature. Mental and external factors encourage an outbreak. As more than two thirds of all migraine victims are women, it is assumed, that female hormones play a certain part. There generally is a link between its appearance and the menstrual cycle. According to present concepts, an innate, raised susceptibility to sudden changes in the nervous system would appear to be responsible.     These changes can run their course in many ways and be triggered by varying factors, called "trigger factors". The result of these changes is then mirrored in inflammable processes and stimuli with raised susceptibility in the brain's fine blood vessels. One is then talking of a neurogenous inflammation. Migraine patients suffer from periodically recurring, strong headaches that emerge attack-wise. These mostly occur in a one-sided manner, however, occasionally also in two-sided fashion. The pain is pulsating or throbbing and often accompanied by nausea, vomiting or sensitivity to light or noise.   The course of an attack is divided into three succeeding phases. In the first phase, general changes in the constitution appear as early symptomatic signs. Some of those concerned subsequently experience the aura phase, which can affect all of the central nervous system's neurological and psychological functions. Shortly before the emergence of headaches a short-lived state of dysesthesia, impaired vision and speech may set in. This is followed by the phase of headaches already described. Contrary to normal headaches, the discomfort will usually increase with physical exertion. Silence, understanding and consideration are decisive factors for effective treatment.