What is low blood pressure and high blood pressure

Hypotension refers to systolic blood pressure less than 90 mm Hg and diastolic blood pressure less than 60 mm Hg, while hypertension refers to systolic blood pressure higher than 140 mm Hg and diastolic blood pressure higher than 90 mm Hg. It is recommended that patients with hypertension eat foods low in sodium. They should also take more physical exercise at ordinary times.