Diagnostic criteria for hypertension (mmHg): episodic blood pressure criteria ≥140/90; 24-hour ambulatory blood pressure monitoring (ABP) criteria are ≥130/80 throughout the day, ≥135/85 during the day, and ≥125/75 at night; when ABP and episodic blood pressure do not agree, one is white coat hypertension, that is, high in the office, normal at home, and normal ambulatory blood pressure monitoring, and the other is reverse white coat hypertension . The current diagnosis and treatment of hypertension is based on incidental blood pressure values. Nocturnal hypertension damage to target organs: 1, closely related to left ventricular hypertrophy; 2, frequent episodes of myocardial ischemia during nocturnal hypertension in patients with coronary artery disease; 3, damage to cerebrovascular (intracranial hemorrhage, thrombosis, vascular dementia, etc.); 4, significant decrease in renal function; 5, damage to heart valves, large blood vessels and pancreas and other organs. It has also been shown that patients with nocturnal hypertension can cause a decrease in nocturnal blood glucose tolerance. Causes and treatment of nocturnal hypertension: 1, secondary hypertension such as sleep apnea hypoventilation syndrome, endocrine hypertension, etc., give etiological treatment; 2, those taking short-acting drugs, change to long-acting antihypertensive drugs or add medium-acting antihypertensive drugs in the afternoon; 3, cardiovascular disease episodes, must control cardiovascular disease episodes in order to protect the patient; 4, neurogenic recumbent hypertension with sitting hypotension, should be quickly to see a doctor in hospital.