Thunderclap headache causes severe head pain that has an abrupt onset, similar to the pain experienced due to a ruptured aneurysm or haemorrhage. It reaches maximum intensity in less than one minute. It’s important to search exhaustively for an underlying cause before diagnosing primary thunderclap headache since there are several serious disorders of brain blood vessels that present with these symptoms.
If no other disorders are present, primary thunderclap headache is generally a benign diagnosis. However, these are some related disorders that could cause thunderclap headache:
Aneurysm – Brain Foundation
Subarachnoid Haemorrhage – Brain Foundation