Which is more serious, primary or secondary hypertension, is not clear and cannot be generalized. 1. Primary hypertension: characterized by insidious onset and slow progression, the course of the disease may last as long as ten or several decades. In the early stage of the disease, there are almost no symptoms, but in the later stage, patients will have symptoms such as dizziness and nausea, and need to take antihypertensive drugs and adjust their lifestyle to effectively control their blood pressure. 2. Secondary hypertension: It is usually caused by some diseases, such as kidney disease, adrenal disease, etc., and belongs to secondary hypertension. In terms of treatment, antihypertensive therapy should be carried out on the basis of treating the primary disease in order to really control the blood pressure. Whether it is primary hypertension or secondary hypertension, it should be given enough attention and actively treated. At the same time, pay attention to the adjustment of lifestyle and dietary habits, and usually have a calm mind to maintain emotional stability, which will help control the blood pressure level. Seek prompt medical attention if you feel unwell.