Bloodletting therapy does not directly treat hypertension, but is mainly used for emergency medical treatment of hypertension. Bloodletting therapy is a method of using needles or knives to puncture or cut specific parts of the body to release a small amount of blood to treat diseases, which is widely recognized, accepted and applied, and has the functions of diarrhea and detoxification, swelling and itching, opening and relieving heat, relieving numbness, antiemetic and stopping diarrhea, relieving pain and first aid. . Modern research believes that bloodletting is a concise hemodilution therapy, which can improve the state of blood circulation, increase the blood flow and oxygen partial pressure at the lesion site, and normalize the blood viscosity, flow rate and vascular pressure, and is an effective rescue method. It is ideal for cerebral hemorrhage, cerebral infarction and stroke precursors with sudden fainting, convulsions and unconsciousness paralysis due to hypertension.