Blood pressure of 85/55mmHg is a kind of low, many patients with hypotension less than 90/60mmHg have no symptoms, this belongs to genetic factors or physical factors, mostly seen in young or old female patients, currently there is no special impact on life expectancy. If the blood pressure is normally very high and suddenly drops to 85/55 mmHg after the application of antihypertensive drugs, or if an elderly patient suddenly lowers her blood pressure to 85/55 mmHg due to a serious disease, be alert to the possibility of a serious decrease in blood pressure due to an overdose of antihypertensive drugs or a serious lesion, resulting in insufficient blood volume, shock, etc. If it is simply a normal life without underlying heart disease, etc., there is no need to be overly concerned in this case.