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The following discussion is for general informational purposes only and is not meant to provide the reader with specific medical advice. Some migraine sufferers experience a prodrome which can precede a headache by hours or days and can include such symptoms as yawning, fatigue, mood swings, food cravings and a heightened sensitivity to sensory stimuli such as light, sound and odors. This warning is referred to as an aura, which is believed to be due to a temporary disruption of normal brain function occurring 20 to 30 minutes before the pain. Common symptoms during the aura are vision disturbances such as flashing lights with zigzagging lines, blurred or lost vision or lateralized tingling, weakness or speech or cognitive difficulties. As the aura clears, the headache often begins rarely, patients experience aura symptoms without headache. Almost all recurring episodic disabling headaches are migraines. Associated features that strengthen certainty of diagnosis include a positive family history, associated symptoms such as nausea, vomiting, and light, sound or movement sensitivity.
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