Other conditions can impact Migraine and Migraine disease can increase the risk of stroke and other ischemic issues. Comorbid conditions are conditions that occur simultaneously but don't cause each other.

Comorbid conditions:

• Half of Iraq Veterans with Migraines Also Have Depression
  Soldiers with Migraine disease are more than twice as likely to have symptoms of depression, anxiety, and post-traumatic stress disorder as soldiers without Migraines.
• Comorbidity of Migraine and Bipolar Disorder
  Recent studies have now shown Migraine disease seems to be comorbid to bipolar disorder. A 2003 study showed that the prevalence of Migraine disease among patients with bipolar disorder was high enough for the researchers to conclude...
• Thyroid Disease Can Be Cormorbid To Headaches & Migraine
  Comorbid conditions can have significant impact on effective treatment of the individual disorders. Thyroid diseases, including hypothyroidism, are among the conditions now know to often be comorbid with headaches and migraines.

Cardiovascular events and stroke:

• Migraine and Stroke Risk
  What the studies have revealed about Migraine disease and stroke risk.
• Migraine Disease Linked to Cardiovascular Disease in Men
  Studies have shown Migraine to associated with risk of major CVD in middle-aged men.
• Migraine with Aura Linked To Cardiovascular Disease in Women
  Women with Migraine with aura have an increased risk of cardiovascular disease.