The difference between hypotension and hypertension is the different values of blood pressure and different clinical manifestations. 1. Different values: the blood pressure values of patients with hypotension are lower than normal values, and the test results of patients with hypertension are higher than normal values. Adults with systolic blood pressure less than 90 mmHg or diastolic blood pressure less than 60 mmHg are considered hypotensive. A systolic blood pressure equal to or greater than 140 mmHg and a diastolic blood pressure equal to or greater than 90 mmHg is considered hypertension. 2. Different clinical manifestations: Hypertension is usually characterized by headache and dizziness. Low blood pressure usually manifests as dizziness, not accompanied by headache. High blood pressure or low blood pressure may cause insufficient blood supply to the cardiovascular and cerebral vessels, causing symptoms of dizziness or palpitations (rapid heartbeat, often accompanied by panic). Abnormal blood pressure requires prompt medical attention. Individualized diagnosis and treatment plan will be formulated by the doctor according to the specific condition, and the patient should not take medication by himself to avoid delaying the condition.