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A chronic migraine is characterised by recurring headaches that cause mild to severe pain on one side of the head. These chronic migraine attacks can last hours up to three days and are often accompanied by nausea and vomiting.
Unfortunately, chronic migraine and episodic migraine symptoms are often accompanied by sensitivity to light and sound as well. Chronic migraine pain is typically throbbing in nature, but it can also be stabbing or dull aches.
While their exact cause is unknown, chronic migraines are thought to be associated with temporary changes in nerves, blood vessels and chemicals in the brain. Migraines can be triggered by stress, tiredness, certain foods or coming on your period.