In his discussion of Möbius’ book Die Migräne, Freud cautions against the view of migraine as a vasomotoric illness. He speaks enthusiastically about Möbius’ detailed treatment of the unresolved issue of causality and the subjective factors of this illness, of individual differences in symptomatology level and of the differential diagnosis of migraine and other braindisorders. Freud advances two major theses about migraine: that migraine like conditions of the stomach, back and heart exist and the possibility of a nasal etiology. Migraine is still largely unexplained. From the analytic point of view migraine can be seen as a conversion symptom, and even as a psychosomatic phenomenon.