People often ask what "complex Migraines" or "complicated Migraines are." That's a difficult question to answer because it varies depending on who's using those terms.

In most areas of medicine, terminology and diagnostic classifications are standardized so that diagnoses are uniform and when one is mentioned, logical discussion or search for information can follow. That applies in the field of what's generally called "headache medicine," the diagnosis and treatment of Migraine and other...