| http://www.w3.org/ns/prov#value | - that: is particularly painful and different from the kinds of headaches you have had before does not go away easily follows an injury, such as hitting your head causes you to miss school You will also want to see a doctor if you have any of these symptoms in addition to a headache: changes in vision, such as blurriness or seeing spots tingling sensations along with the headache (for example, tingling
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