High pressure, also known as systolic blood pressure, 103mmHg belongs to the normal range, the normal blood pressure of systolic blood pressure is 90 to 119mmHg, and the normal high pressure is 120 to 139mmHg. Systolic blood pressure is related to the pumping of the heart. Systolic blood pressure greater than or equal to 140mmHg belongs to high blood pressure, the cause of primary high blood pressure is still unclear, while secondary high blood pressure is mainly related to renal disease, endocrine disease, heart disease and so on. When the systolic blood pressure is less than 90mmHg, it is hypotension. Acute hypotension is mainly related to insufficient blood volume or abnormal vasodilatation, which can show dizziness and blurred consciousness. Upright hypotension is hypotension caused by sudden change of body position. Hypotension caused by bad drugs such as taking nitroglycerin, antihypertensive drugs and so on. Some women and elderly people have slightly lower than normal blood pressure but no discomfort symptoms, usually without treatment. High pressure of 103mmHg belongs to the normal range, once more or lower than normal blood pressure, should go to the hospital as soon as possible to clarify the cause of the disease.