The diagnostic criteria for shock need to be combined with the patient’s history, clinical manifestations, and laboratory tests. Shock usually has a history of massive bleeding, severe vomiting or diarrhea, trauma, etc. Clinical manifestations may include pale skin, cyanosis, oliguria (24-hour urine volume less than 400 ml or less than 17 ml per hour) or anuria (24-hour urine volume less than 100 ml), decreased blood pressure (systolic blood pressure less than 90 mmHg), increased pulse rate (i.e., greater than 100 beats/minute), etc. Laboratory examination of blood routine such as red blood cells, hemoglobin, platelets and other indicators decreased, when the shock leads to anaerobic metabolism can cause hyperlactatemia (arterial lactate is greater than 1.5 mmol / L), but also combined with other examinations such as CT, X-ray to make a comprehensive judgment. In addition to this, the presence of shock can be determined by the shock index, which is the ratio of pulse rate to systolic blood pressure, and if it is greater than 1, shock is present. Shock is diagnosed when there is a history of shock, the above clinical signs and findings are consistent with shock. It is recommended to go to the hospital and ask the doctor to make a judgment when shock occurs.