The correct expression for a low pressure of 100 and a high pressure of 150 is 150 mmHg systolic and 100 mmHg diastolic. a low pressure of 100 and a high pressure of 150 is considered moderate hypertension. Whether low pressure 100 and high pressure 150 is severe depends on the patient’s clinical presentation, whether it is combined with other underlying diseases and whether there are complications. The severity cannot be evaluated simply by the high or low number. Clinical manifestations: If the patient’s usual blood pressure has been maintained at about 150/100mmHg, and the patient does not have obvious symptoms such as headache, dizziness, palpitations, chest tightness, etc., then symptomatically speaking, the condition of such patients is not serious, and it is sufficient to insist on taking antihypertensive drugs to control the blood pressure to a reasonable level. Whether combined with other underlying diseases: In comparison, it is obvious that patients with combined other underlying diseases are more serious than those with pure hypertension. Patients with moderate hypertension alone should take antihypertensive drugs to control their blood pressure to a normal level while improving their lifestyle. If the patient has elevated blood pressure due to acute myocardial infarction or aortic coarct, these patients are critically ill, have a poor prognosis and high mortality, and need to have their blood pressure controlled to a normal level as soon as possible. Complications: Generally speaking, hypertension is not scary, what is scary is the damage to vital organs caused by hypertension. If blood pressure is not controlled for a long time, it can lead to sclerosis of cerebral vessels, cardiovascular, retinal, renal vessels, limb vessels and arteries throughout the body, causing serious clinical conditions such as cerebral infarction, coronary heart disease, arteriosclerosis of limbs and renal failure.