Understanding the speed at which migraine headaches develop is of importance to patients. Determining the proportions in which different headache pain build-up occurs, may provide health care practitioners with valuable information with which to prescribe the most appropriate treatment. Patients who experience a slow pain build-up may gain more benefit from medications which have a slow onset of effect, high tolerability and long action. Conversely, medications with a rapid onset of effect may be of greater benefit to patients who experience rapid onset of migraine pain.

Inclusion Criteria:

• Subject is outpatient.
• Subject has a diagnosis of migraine with/without aura according to IHS criteria, of at least 1 years duration.
• Subject is able to comprehend the study procedures and to comply with study requirements.

Exclusion Criteria:

• Subject has other chronic pain condition(s) not associated with migraine
• Subject is unable to understand the schedule/questionnaire.