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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.
Thunderclap Headaches: Symptoms, Diagnosis, Solution. The term thunderclap headache brings up certain frightening images of something that happens suddenly and intensely, which is exactly what this type of headache is. It seems to occur out of nowhere and reaches its peak within 60 seconds of its onset.