Hypertensive nephropathy is a complication of hypertension, which is classified into primary hypertension and secondary hypertension. In primary hypertension, if the blood pressure is not well controlled over time, remaining above 90-140 mmHg, hypertensive kidney damage generally appears after more than five years. This is manifested as benign arteriolar nephrosclerosis. At this stage, patients may experience increased nocturia, and in severe cases, proteinuria or even elevated creatinine levels may occur. Conversely, patients with malignant hypertension often experience kidney damage in a short period of time, which can quickly progress to renal failure, leading to uremia.