What's the difference between hypertension and hypertension?

Hypertension is only a symptom, not an independent disease. Many diseases, such as acute and chronic nephritis, pyelonephritis, hyperthyroidism, pheochromocytoma, Cushing syndrome, primary aldosteronism, etc. , may increase blood pressure. However, because this kind of hypertension is secondary to the above diseases, it is usually called secondary hypertension or symptomatic hypertension. Hypertension is an independent disease, also known as essential hypertension, accounting for more than 90% of patients with hypertension. At present, the cause of the disease is not completely clear. Clinically, the main manifestation is the increase of arterial blood pressure. However, with the aggravation of the disease, the heart, brain, kidney and other organs are often involved, resulting in functional or organic changes, such as hypertensive heart disease, heart failure, renal insufficiency, cerebral hemorrhage and other complications. Because of the different etiology and pathology, the treatment principles are different. Only by actively treating hypertension can the complications of essential hypertension be effectively prevented. However, secondary hypertension can only be effectively controlled by treating the primary disease first, and it is difficult to control blood pressure only with antihypertensive drugs. Therefore, patients with hypertension must exclude other diseases before they can be diagnosed as hypertension.