Body temperature 35.8 ℃ is lower than the normal body temperature level, may be physiological hypothermia, may also be due to disease (such as hypothyroidism, etc.), need to be specifically analyzed. 1. Physiological hypothermia: such as being in a low-temperature environment for a long time or sweating a lot after exercise, etc., will lead to a lower body temperature, which is physiological, and regular monitoring of body temperature can be done. 2. Disease: Hypothyroidism caused by low metabolic state will also appear in the case of low body temperature, can also be accompanied by apathy, edema and other symptoms, need to improve the thyroid function and thyroid ultrasound and other tests to clarify. Body temperature of 35.8 degrees is lower than the normal body temperature, it is recommended to monitor the body temperature changes, if necessary, timely consultation to clarify the cause of the disease.