Migraine What are migraines? Migraines are a recurring type of headache. They cause moderate to severe pain that is throbbing or pulsing. The pain is often on one side of your head. You may also have other symptoms, such as nausea and weakness. You may be sensitive to light and sound. What causes migraines? Researchers believe that migraine has a genetic cause. There are also a number of factors that can trigger a migraine. These factors vary from person to person, and they include: Stress Anxiety Hormonal changes in women Bright or flashing light Loud noise Strong smell Medicine Too much or not enough sleep Sudden changes in weather or environment Overexertion (too much physical activity Tobacco Caffeine or caffeine withdraws Skipped meal Medication overuse (taking medicine for migraines too often Some people have found that certain foods or ingredients can trigger headaches, especially when they are combined with other triggers. These foods and ingredients i...