There are more causes of low blood pressure in young people, common body constitution, pregnancy, postprandial hypotension, heart disease, endocrine disease, excessive water loss in the body, diseases that cause bleeding from organs, trauma, medication and so on. 1. Physical condition: If the patient is thin and weak and eats a small amount of food, low blood pressure may occur, but there is no disease that causes the blood pressure to decrease. 2. Pregnancy: A woman’s blood pressure will be relatively low during pregnancy and will recover after delivery. 3. Postprandial hypotension: A decrease in blood pressure may occur 2 hours after eating, mostly in the elderly. 4. Heart disease: myocardial infarction, heart failure, arrhythmia, etc. 5. Endocrine diseases: hypothyroidism, hypoadrenocorticism and so on. 6. Excessive water loss in the body: severe diarrhea, severe vomiting, excessive exercise or hot weather leading to profuse sweating, etc. 7. Diseases that cause bleeding from organs: gastrointestinal bleeding caused by peptic ulcer or cirrhosis, ectopic pregnancy (ectopic pregnancy, etc.). 8. Trauma: Bleeding from ruptured blood vessels due to trauma can cause hypotension. Including open and closed (the wound is not visible on the surface of the body, but there is bleeding inside the body). Commonly seen in limb cutting injury, chest and abdominal stab wounds, abdominal impact injury. 9. Drugs: overdose of vasodilators, drugs that reduce myocardial contractility, diuretics and other drugs can cause hypotension. Serious infectious diseases. It is recommended that young people should not be overly nervous after experiencing low blood pressure, and should go to the hospital in time to avoid delaying their condition if there are combined symptoms.