The high fever has not gone down but the mental state is very good on the one hand, may be the pathogen pathogenic ability is not strong, on the other hand, may also be their own physical fitness, resistance is strong. 1. The pathogen’s ability to cause disease is not strong: fever is usually caused by bacterial or viral infections, bacterial or viral infections will lead to an increase in body temperature, which is the body’s normal mechanism to protect itself. If the mental state is good at this time, it means that the virulence of bacteria or viruses is not strong, and will not cause generalized weakness, pain and other symptoms. 2. their own body is good: has been a high fever does not go down mental state is very good may also be their own body is good, in this case, although the body temperature is high, but because of their own immunity, resistance are relatively strong, and will not be due to fever, weakness, pain and other symptoms. The high fever does not go down but the mental state is very good may be due to the pathogen is not strong ability to cause disease or their own physical condition is better, but it is recommended that the patient has been high fever does not go down in time to seek medical treatment, to avoid the impact on the body.