Occasional body temperatures below 36 degrees are generally harmless, but if they are below 36 degrees for an extended period of time there may be hazards such as confusion, lethargy, slowing or stopping of breathing, and slowing or stopping of the heartbeat. The armpit temperature of a normal human body is 36.1℃～37℃, and the oral temperature is 36.3℃～37.2℃, with certain fluctuations throughout the day. If the body temperature is lower than 36 degrees by chance, it may be caused by the low temperature of the surrounding environment, which is usually not harmful, and will return to normal after going to a warm environment. However, if the body temperature is below 36 degrees for a long period of time, the patient will have shivering, lowered blood pressure, slowed respiration, and pale, cold skin. If no timely action is taken, it may lead to the danger of the patient’s confusion, agitation, apathy and drowsiness, slowing or stopping breathing, slowing, or irregular heartbeat, or even stopping. Therefore, when the symptoms of a body temperature below 36 degrees do not improve for a long time, immediate medical attention should be sought to avoid danger.