AbstractReversible Cerebral Vasoconstriction Syndromes (RCVS) are a cluster of conditions that show reversible multifocal vasoconstriction of the cerebral arteries with typical manifestations like thunderclap headache and less commonly focal neurologic deficits related to brain edema, stroke, or seizure. We describe a case of 31 year old male staff nurse who arrived at the emergency room for regular morning duty and suddenly became unresponsive. He was immediately intubated and managed following which NCCT brain was taken. It revealed generalized brain edema. Other blood and radiological investigation reports were unremarkable. After ruling out all possible diagnosis he was diagnozed as a case of RCVS. He was well-managed by the emergency team and was discharged in a stable condition with nil neurological deficit.