Renal hypertension is caused by kidney disease. It is a manifestation of hypertension that occurs in the course of kidney disease. It accounts for 5-10% of hypertension in adults. It is the most common type of secondary hypertension. It can be caused by factors such as increased volume and activation of the angiotensin-aldosterone system or decreased activity of vasodilator substances in the body. Diastolic blood pressure is significantly elevated. Clinically, there are two major categories of renal vascular hypertension and renal parenchymal hypertension. Hypertension caused by renal artery stenosis leading to renal ischemia is called renal vascular hypertension; hypertension caused by unilateral or bilateral renal parenchymal disease is called renal parenchymal hypertension. Almost every renal parenchymal disease can cause hypertension. However, the chance of hypertension occurring varies with different types of pathology. Renal parenchymal hypertension is related to the functional status of the glomerulus, and blood pressure is elevated when glomerular function is diminished. The incidence of hypertension can be as high as 83% in late renal failure.