Migraine is most likely to occur at noon, according to an article just published in Headache by Norwegian researchers. Although only 58 patients participated in this year-long study, there was a very clear peak of occurrence at noon. This finding is different from what was reported in previous studies, which suggested that the most likely time for a migraine attack is in early morning hours. The authors speculate that the restorative effects of sleep and work stress may be responsible for their finding.