Fever is one of the typical symptoms of new coronary pneumonia. During the epidemic, body temperature needs to be measured everywhere, such as at the entrance of the community, highway intersections, etc. Some people will have a body temperature lower than 36°C. The following causes are common: 1, measurement errors, damaged measuring instruments or incorrect measurement methods, which may result in low body temperature; 2, due to physiological factors, such as a very small number of people born with low body temperature, some frail elderly people, etc. 3, prolonged exposure to low temperature; 4, caused by pathological factors, such as long-term malnutrition, hypoadrenocorticism or hypothyroidism patients, need to promptly clarify the cause, and targeted treatment.