The burden of migraine strongly increases considering its linkage with other psychiatric, neurological, cardiovascular and cerebrovascular diseases. Migraine is positively associated with many disorders: some are confirmed by several studies whereas others remain uncertain or controversial. The association with some disorders is not simply due to concomitance but it implies a linkage in terms of causality. Highlighting these relationships is important to improve treatment strategies, broaden our knowledge of the pathophysiology and understand if migraine is per se a modifiable risk factor for some disorders.