['To assess the association between epistaxis and arterial hypertension.', 'A prospective study was conducted in 80 patients admitted in the emergency department, 42 with epistaxis and 38 well-matched controls. Blood pressure was measured upon admission and by continuous 24-hour ambulatory monitoring on the following days.', 'Estimated values upon admission did not differ between groups. A definitive diagnosis of hypertension was set in 18 patients admitted for epistaxis (42.9%) and in 11 controls (28.9%, p = NS). Systolic pressures during the 24-hour recording period, systolic pressures during day and diastolic pressures during night were significantly higher among patients admitted for epistaxis than among controls.'] Is epistaxis of patients admitted in the emergency department indicative of underlying arterial hypertension?