90 over 40. Is that bad?
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High pressure 90 low pressure 40 generally refers to systolic blood pressure 90mmHg, diastolic blood pressure 40mmHg. Whether systolic blood pressure 90mmHg, diastolic blood pressure 40mmHg is dangerous needs to be judged according to the specific situation.
Normal range of blood pressure is systolic blood pressure 90-139mmHg, diastolic blood pressure 60-89mmHg, and systolic blood pressure 90mmHg, diastolic blood pressure 40mmHg lower than the normal range, indicating hypotension. If it is physiological hypotension caused by sudden change of position, after a full meal, etc., it can usually be relieved after paying attention to rest and correcting the cause, generally not serious. However, if it is caused by dehydration, infection, massive bleeding and other pathological factors, it is usually more serious because the situation is more critical.
