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Unlike a migraine, thunderclap headaches seem to come on suddenly. The pain grabs your attention in the same way a clap of thunder does. You can feel pain anywhere on your head or neck. You may even feel it in your back. You might also have several other symptoms, including: Changes in vision. Confusion. Nausea.
The headache of heart disease is usually dull, one sided, and experienced in the face, eye or forehead. It can even be felt in the back of the head (about 20% in one series were occipital headache). There has been a recent case of Thunderclap Headache caused by an acute heart attack.