In recent years, a large number of clinical studies have confirmed that blood pressure variability (BPV) is an independent factor for predicting the risk and target organ damage of stroke, coronary heart diseases and chronic kidney diseases. Fluctuant hypertension is defined as that BPV above the normal level complicates with hypertension, and the major characteristic clinical symptoms of fluctuant hypertension are morning blood pressure peak, postprandial hypotension and covert nocturnal hypertension. At present, neural reflex, humoral regulation, and vascular system receptor regulation are c...