A headache caused by a blow to the head is accompanied by vomiting, nausea, blurred vision, confusion, or memory problems. You could have a concussion or bleeding in the brain.
You have severe pain, nausea, vomiting, or confusion and a fever of more than 100 degrees, increased pain when you bend your head forward, a stiff neck, or blurred or double vision. These are all signs of a dangerous infection like meningitis or a brain hemorrhage.
It feels as if you're having the worst headache of your life. Although you may be just fine (except for the pain), your doctor should make sure nothing else is going on.
You feel dizzy, confused and nauseated. First, get fresh air immediately, since the headache could be caused by toxic fumes.
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