The mechanism of elevated low pressure is mainly increased heart rate and increased peripheral vascular resistance. Therefore, the causes of occasional low-pressure elevation, including lifestyle habits, drugs, diseases. 1. Lifestyle habits: such as occasional emotional excitement, will make the catecholamine concentration rise, temporarily caused by the resistance of small arteries contraction enhancement, vascular resistance, which will also make the heart rate increase, causing the diastolic period of the cardiac cycle shortened, resulting in the blood flow from the heart to the periphery of the decrease in blood flow in the aorta, both will lead to the emergence of emotional excitement in low-pressure elevation. 2. Drugs: when using vasoconstrictor drugs (including epinephrine, norepinephrine, vasopressin, etc.), it temporarily causes vasoconstriction, which increases peripheral vascular resistance and leads to low-pressure elevation after using the drugs. 3. Diseases: e.g. small arteriosclerosis, especially common in patients with hyperlipidemia, which may occasionally temporarily cause an increase in peripheral vascular resistance, leading to elevated low pressure. When elevated low pressure is found, it is recommended to go to the hospital in time and actively cooperate with the doctor for treatment.