If the body temperature is lower than 35 ℃ is called hypothermia, hypothermia is seen in the following reasons: 1, common in endocrine metabolic diseases, such as hypothyroidism, adrenal cortical insufficiency, in this case there will be the occurrence of hypothermia. 2, outdoor workers, if in winter when the outdoor temperature is too low, there will be a change in body temperature with the environment, resulting in the occurrence of hypothermia. 3, drowning, such as freshwater drowning or seawater drowning, there will be hypothermia. 4, serious infections, such as septic shock, there will be hypothermia. In the case of drowning, such as freshwater drowning or seawater drowning, hypothermia can occur. 4, severe infections, such as the emergence of septic shock, will also occur hypothermia, when there will also be a fine and rapid pulse, pale, wet and cold extremities, urine measurement can not occur.