Blood volume insufficiency chooses different departments according to different symptoms, usually need to hang up cardiology, neurology, emergency department, gastrointestinal surgery, vascular surgery and so on. If there is weakness of limbs, slurred speech or crooked corners of the mouth, it may suggest cerebral ischemia, and need to go to the Department of Neurology or the Department of Emergency Medicine. If symptoms such as chest tightness and chest pain, vomiting and fainting occur, it suggests myocardial ischemia and needs to go to the cardiology department or emergency department. If abdominal cramps, abdominal distension, vomiting and diarrhea occur, it suggests that there may be mesenteric vascular ischemia or embolism, and should go to gastrointestinal surgery or emergency department. If there is severe pain, numbness and loss of sensation in the lower limbs, it suggests arterial embolism in the lower limbs, and should be referred to the Vascular Surgery Department or the Emergency Department. Insufficient blood volume has different symptoms according to different causes, and the department should be selected according to the symptoms, and if the condition is critical, the patient should go to the emergency department in time.