What Are the Causes of Chronic Migraine?

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Researchers haven’t identified a definitive cause for migraines. However, they have found some contributing factors that can trigger the condition. Factors that may trigger a migraine include:
  • bright lights
  • changes in brain chemicals, such as a decrease in levels of the brain chemical serotonin
  • changes in barometric pressure
  • changes in sleep patterns
  • dehydration
  • excess stress
  • severe heat, or other extremes in weather
  • hormone changes in women, such as estrogen and progesterone fluctuations during menstruation, pregnancy, or loud sounds
  • menopause
  • intense physical activity
  • skipping meals
  • unusual smells
  • use of certain medications, such as oral contraceptives or nitroglycerin
If you experience a migraine, your doctor may ask you to keep a headache journal. Writing down what you were doing, what foods you ate, and what medications you were taking before your migraine began can help identify your triggers. Keyword: causes chronic migraine; causes chronic migraines; chronic migraine causes; chronic migraines causes