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Background Idiopathic hyper eosinophilic syndrome is a rare pathology which may manifest with stroke. Here we report a patient who presented with multiple watershed strokes and a Bells’ palsy due to Idiopathic-Hyper eosinophilic syndrome(I-HES).Case A 67 year old female patient was admitted with subacute upper limb and lower limb weakness, and a Bells’ palsy. Laboratory tests revealed eosinophilia. No identifiable cause was established, with a negative infective and malignancy screen. Brain magnetic resonance imaging (MRI) showed widespread multiple acute small infarcts. Transoesophageal echocardiogram did not reveal an intracardiac source. The patient was treated with methylprednisone, aspirin and clopidogrel. There was a rapid correction of her eosinophil count to a normal level. She made recovery to near baseline function after 3 months of rehabilitation.Conclusion I-HES can present with a constellation of neurological symptoms, including multiterritorial stroke and cranial nerve palsies. Early diagnosis and rapid reduction of eosinophils is important in preventing further complications of I-HES. Exclusion of intracardiac thrombi in the context of multiterritorial strokes and I-HES is necessary.