Low blood pressure may be physiological low blood pressure, or it may be caused by bleeding, heart failure, malnutrition and other diseases, or low blood pressure caused by improper use of antihypertensive drugs. 1. Physiological low blood pressure: It is considered to be related to genetic factors and thinness. 2. Trauma leading to hemorrhage, etc. can cause lower blood pressure. Chronic heart failure, adrenal insufficiency and other diseases can also cause a gradual decrease in blood pressure. In addition, long-term malnutrition, chronic wasting disease, severe acute infectious diseases, chronic infections such as tuberculosis can cause low blood pressure. 3. Inappropriate use of antihypertensive drugs, such as overdose, can also cause low blood pressure. In case of low blood pressure, it is recommended to go to the hospital to find out the cause and get timely treatment.