Primary headaches are stand-alone illnesses caused directly by the overactivity of, or problems with, structures in the head that are pain-sensitive. This includes the blood vessels, muscles, and nerves of the head and neck. They may also result from changes in chemical activity in the brain.
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അത്ര നിസാരക്കാരനല്ല ഈ തലവേദന | Symptoms and Causes of Headache | Dr.Susanth |
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