A body temperature of 35°C is considered mild hypothermia, which can affect the normal functioning of the body’s systems and can be life-threatening if not rewarmed in time as the body temperature decreases. Normal body temperature is about 36 ~ 37 ℃, when prolonged exposure to the cold environment or the central temperature regulation function is impaired, can lead to hypothermia. A body temperature of 35°C is considered mild hypothermia, and the patient’s skin is pale and cold, and in the early stages, he or she will produce heat to maintain body temperature through chills. In order to maintain blood circulation and respiration, early symptoms such as tachycardia and shortness of breath will occur. The motor system stiffens muscles and joints due to hypothermia, resulting in unsteady walking and shaky limbs. Systemic manifestations such as headache, dizziness, nausea and bloating may also occur. As the condition progresses, without timely treatment, the body temperature can drop further, which can be life-threatening in severe cases.