Hi there ~ Severe migraines are frequently associated with high blood pressure and the hypertension usually resolves when migraines are treated. Migraines are a treatable condition. You friend does need medical attention. There are inexpensive medication for migraine prophylaxis like propranolol and she can use over the counter pain killers for moderate pain migraines. However she does not worry about stroke unless she has risk factors. I would recommend that you have her be seen by a primary care clinician first before visiting with a neurologist. I hope this helps. Take care and have a nice day !