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Other symptoms to be expected in benign brain tumours would include headache, vomiting, visual deterioration (papilloedema), focal symptoms (like focal epilepsy, monoplegia, deafness and aphasia), dizziness, personality changes and mental deterioration.
The vascular theory posits that migraine is caused by dilatation and constriction of blood vessels, in which the pain is due to pressure of the blood vessels exerted on pain-sensitive structures and the focal symptoms are caused by ischemia.