37.1°C is not considered a low-grade fever, and clinical practice usually defines more than 37.3°C as fever. In clinical practice, 37.3℃-38℃ is usually defined as low fever, 38.1℃-39℃ is moderate fever, 39.1℃-41℃ is high fever, and 41℃ or more is ultra-high fever. The duration of the disease is less than 2 weeks for short-term fever, also known as acute fever, more than 2 weeks for long-term fever. And cause the body temperature rise more factors, such as emotional excitement, strenuous exercise, drug fever, vaccination, hyperthyroidism and other diseases. Body temperature of 37.1 ℃ does not mean fever, patients are advised to continue to observe. If the body temperature continues to rise, but below 38.5 ℃, generally do not consider the use of drugs to cool down, you can take warm water towel cooling. If the fever temperature is above 38.5℃, it is recommended that the patient go to the Department of Infectious Diseases of the hospital, complete the relevant examinations, further clarify the cause of the disease, and take targeted treatment programs. Usually pay attention to avoid cold, tired, regular work and rest, reasonable diet, avoid alcohol and tobacco. If you feel abnormal body temperature, it is recommended to observe on your own first, and if you find only a transient increase in body temperature after several measurements, you do not need to worry too much.