A migraine is not usually dangerous, however certain rare complications associated with migraines can pose risks to health, such as:
Status migrainosus - a severe and prolonged migraine attack lasting more than 72 hours. It may require medical attention to alleviate symptoms and prevent dehydration.
Migraine with brainstem aura - dizziness, double vision, slurred speech and difficulty swallowing. Although rare, it may increase the risk of stroke.
Migrainous infarction - a rare complication where the migraine attack triggers a stroke-like episode, resulting in brain tissue damage.
In rare cases, other complications such as medication overuse headaches, which result from excessive use of pain relievers or serotonin syndrome, which happens when certain medications interact and cause excessive serotonin levels.