High pressure of 140 may be due to factors such as emotional tension, strenuous exercise, or primary hypertension or secondary hypertension. 1. Sympathetic nerve excitation during emotional stress leads to increased heart beat and faster heart rate, so blood pressure will rise; after strenuous exercise, due to increased oxygen demand of the body, the heart reactively increases heart rate and cardiac output, so blood pressure rises. Usually, no treatment is needed, and the blood pressure can return to normal after rest. 2. Primary hypertension: If you have high blood pressure of 140 for 3 times in a row on the same day without drinking coffee or alcohol, it may be primary hypertension, which may be related to heredity, diet, smoking, obesity, mental stress and other factors. 3. Secondary hypertension: High pressure of 140 may also be secondary hypertension, which may be related to water and sodium retention caused by renal disease, primary aldosteronism, Cushing’s syndrome and so on. It may also be related to increased myocardial excitability caused by pheochromocytoma, hyperthyroidism, etc. It may also be related to aortic stenosis. Ruling out physiologic factors suggests active medical care and compliance with medications and treatments prescribed by the physician.