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Congenital harlequin syndrome is rare dysautonomia of the face most often reported in adults and rarely in infants and children. It is a diagnosis of exclusion and a seemingly benign condition. We report a case of a 6-month-old girl with episodic unilateral and bilateral facial flushing provoked upon awakening and resolved with sleeping with associated autonomic features consistent with harlequin syndrome. This is followed by a review of cases identified regarding this condition in infants and children.