A body temperature of 35.5°C is generally abnormal if incorrect measurements are ruled out and should be promptly seen by a hospital internal medicine department to identify the cause. The main clinical sites for body temperature detection are anorectal, oral and axillary, and the common detection sites are in the axilla. Its normal value is 36.3℃-37.2℃ for oral sublingual temperature, 36.5℃-37.7℃ for rectal temperature, and 36.0℃-37.0℃ for axillary temperature. If the body temperature is 35.5℃, it belongs to the abnormal body temperature range and hypothermia. It can be seen that the human body has been in a relatively cold external environment for too long, the human body sweats a lot to take away a lot of heat from the body, as well as being infected by more serious pathogens, it is recommended to promptly seek medical examination, judged by a professional doctor, and give the appropriate treatment. In addition, you should pay attention to diet and nutrition, regular work and rest, actively participate in physical exercise, avoid smoking, alcohol and spicy stimulating diet.