vascular tone pertains to how much a blood vessel narrows compared to how widely it dilates. Because a link between tyramine ...

there are really only three major types of headaches-- tension headaches, which are caused by tight neck muscles; vascular headaches like migraines or cluster headaches, which come from changes in ...

Two unusual cases of vascular headache, one caused by jugular venous compression from a goiter and one triggered by flushing associated with a CGRP-producing renal tumour, are reported.