Is low pressure 100 high pressure 140 serious?

Hypertension is generally classified into three levels. Grade 1 is mild, with a systolic blood pressure of 140mmHg-159mmHg and a diastolic blood pressure of 90mmHg-99mmHg. grade 2 is moderate, with a systolic blood pressure of 160mmHg-179mmHg and a diastolic blood pressure of 100mmHg-109mmHg. grade 3 is severe, with a systolic blood pressure of ≥180mmHg and a diastolic blood pressure of ≥110mmHg. there is also pure systolic The first level of hypertension is systolic blood pressure ≥ 140mmHg, diastolic blood pressure <90mmHg. low pressure 100mmHg, high pressure 140mmHg, according to the above, belongs to the first level that is mild, this blood pressure is not serious.