The main clinical symptoms of low blood pressure include dizziness, which is caused by ischemia and hypoxia in the brain due to low blood pressure. The primary causes of low blood pressure are insufficient cardiac contractile force, changes in vascular elasticity, and inadequate blood volume, leading to insufficient perfusion in the body and vital organs, causing ischemia and hypoxia. Dizziness is a major symptom of cerebral ischemia. Not only can severe dizziness cause headaches, but it can also lead to unconsciousness. Severe low blood pressure can cause confusion, apathy, and other symptoms, requiring active treatment to raise blood pressure.