The American Migraine Foundation estimates that at least 39 million American live with migraines, but since so many go undiagnosed, the actual number may be much higher.2 There are a number of symptoms that may or may not present themselves during the course of the headache, and not every person will experience every symptom. This may make it difficult to know if you have a migraine. Some common symptoms of a migraine include2: Intense head pain that ranges from moderate to severe and may be unbearable. Head pain that may be localized to one side only. Many patients experience migraine behind their eyes or cheeks. A throbbing, pounding sensation that worsens with physical activity or movement. Pain severe enough to impact your day to day life and cause you to miss work, school or other activities. An extreme sensitivity to light or smell. Nausea and/or vomiting.