| http://www.w3.org/ns/prov#value | - (possible indication of brain hemorrhage or a ruptured aneurysm).Chronic or severe headaches that begin after age 50.Headaches accompanied by other symptoms, such as memory loss, confusion, loss of balance, changes in speech or vision, or loss of strength in or numbness or tingling in arms or legs (possibility of small stroke in the base of the brain).Headaches after head injury, especially if dr
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