I often hear patients complain: "Doctor, I'm just looking for high blood pressure. You can prescribe some medicine for me, but I don't want to have an examination." Yes, the blood pressure is high or not. Just take a blood pressure measurement. Why did the doctor ask you to have an examination? Now let's briefly explain the reason. The causes of high blood pressure are different. In fact, high blood pressure is just a phenomenon, but the specific causes of high blood pressure are different. Hypertension is divided into secondary hypertension and primary hypertension. Patients with primary hypertension must first exclude secondary hypertension before they can consider the diagnosis of primary hypertension. The different causes of hypertension determine the different treatment methods. What is secondary hypertension? Secondary hypertension is the phenomenon of blood pressure rise caused by certain diseases or causes, so when the primary disease is cured, the hypertension as a secondary symptom will also drop and return to normal or significantly lower than before. Therefore, for this type of hypertension, it is very important to identify the cause as early as possible and treat the primary disease in time. These common diseases make blood pressure surge and secondary hypertension have a wide range of types and distribution. Generally, it is more common to classify it according to its location. For example: related kidney diseases, renal parenchymal hypertension, renal vascular hypertension, etc., we need to do routine urine tests, renal function tests, renal ultrasound, renal artery ultrasound, etc. to find the clues of these diseases. At the same time, the abnormality of the above examination results also determines how the doctor chooses the best way to treat you. Related endocrine diseases such as hyperthyroidism and hypothyroidism; Adrenal diseases such as Cushing's syndrome, primary aldosteronism, pheochromocytoma, etc. can cause abnormal blood pressure, so we need to test thyroid function, renin-angiotensin-aldosterone, and even adrenal ultrasound or CT to exclude these diseases. Mechanical blood flow disorders, such as coarctation of aorta, arteriovenous fistula, aortic insufficiency, and so on, can be characterized by abnormal blood pressure difference in upper and lower limbs, high blood pressure in upper limbs, and low or low blood pressure in lower limbs. This requires us to improve the blood pressure of limbs, cardiac ultrasound and other examinations to find clues. Exogenous factors such as food poisoning, contraceptives, use of high-dose steroid hormones, etc. may cause blood pressure to rise. At this time, doctors need to make a judgment through consultation or necessary toxicological analysis. Other diseases, such as carcinoid syndrome, polycythemia vera, obstructive sleep apnea hypopnea syndrome, can also lead to increased blood pressure, which requires us to improve blood routine test or sleep monitoring. Having said so much, we just listed a few common diseases that can lead to secondary hypertension. In addition, there are many diseases that can lead to hypertension. The doctor will select necessary examinations for you according to your symptoms to help you determine the cause of hypertension. Examinations can help screen organ damage. In addition, patients often hear that "Brother Wang next door died of cerebral hemorrhage at a young age last night, which scared me to death. Come to see my high blood pressure". Yes, the human body is an organic whole, and various diseases will affect each other. Hypertension doctor