ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY
Headache. Computer X-ray artwork of a lateral view of a human skull. The red area represents pain caused by a headache (cephalalgia). Common causes of headaches are tension, migraine, eye strain, dehydration, low blood sugar, and sinusitis. Much more rarely, headaches may be due to life-threatening conditions such as meningitis, encephalitis, cerebral aneurysms, extremely high blood pressure, and brain tumors.
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