In general, shock is caused by a sudden decrease in circulating blood volume, insufficient blood perfusion to important tissues and organs, and inadequate nutrient supply, resulting in impaired cellular function and metabolic disorders in the body after the body has been attacked by strong pathogenic factors, which usually lead to the following causes: 1. Hypovolemic shock, which also includes hemorrhagic shock. These factors are usually caused by ulcer disease, esophageal varices or trauma that triggers hemorrhage. Burn shock usually occurs because the patient has a large area of burns, for severe vomiting, diarrhea, etc. can lead to water loss can also cause hypovolemic shock. 2, distributed shock, usually infectious shock and anaphylactic shock, neurogenic shock is the main. 3, cardiogenic shock, often due to cardiac systolic weakness, arrhythmia, heart ejection dysfunction triggered. 4, obstructive shock, because of pulmonary tethering, pericardial The shock caused by compression, tension pneumothorax.