The causes of unstable blood pressure include physiological and pathologic, pathologic including poorly controlled hypertension, pheochromocytoma, angina pectoris and other diseases, need to clarify the cause of the cause of treatment. 1. Physiological: unstable blood pressure can occur in cases of mental tension and anxiety, prolonged staying up late and high pressure, etc. It is recommended to keep a happy mood, regular work and rest, relax the mind, quit smoking and drinking, and reasonably exercise to keep the blood pressure stable. 2. Pathological: when hypertension is poorly controlled, you need to actively cooperate with your doctor to choose the most suitable antihypertensive drugs for you, and it is not recommended to stop and change the drugs without authorization; blood instability caused by pheochromocytoma can be removed through surgical treatment of the tumor; angina pectoris can be relieved by taking medicines such as nitroglycerin, bisoprolol and other medicines to relieve the discomfort. Adverse reactions to medications are promptly consulted, and medications are contraindicated for those with allergies.