Hypertension can be checked by the following methods: i. Measurement of blood pressure, requiring at least 10 minutes of rest in a quiet state, and measurement of blood pressure in both upper arms, which can be diagnosed if the blood pressure in both upper arms is ≥140/90 mmHg for several times. Second, clinical manifestations, patients with hypertension can have typical clinical manifestations, such as headache, dizziness, chest tightness, chest pain, and weakness, but some patients with hypertension do not have typical clinical manifestations. Third, secondary hypertension can also be clearly diagnosed by renal vascular ultrasound, adrenal CT and other examinations. The examination of hypertension should be judged by a combination of clinical manifestations and auxiliary examinations.