When it comes to fever, the vast majority of people think that it is a sign of illness and is harmful to the human body, so they only think about how to use drugs to bring down the body temperature. In fact, occasionally fever has certain benefits for the body, raising the body temperature has the most suitable temperature for the growth of many pathogens, reducing its growth rate, thus reducing the number of pathogens facing the organism. On the other hand, the high temperature caused by fever can inactivate viral enzymes or toxins, and fever can speed up the chemical reactions in the body to increase the level of immune response, so that the immune system can speed up the attack on the pathogens and shorten the process of infection. Then again, fever can make the patient feel sick, in which case the patient is likely to be going to rest to prevent further damage to the organism, while having more physical energy to deal with the infection. Therefore, there is a new understanding of fever, and in the future, when you encounter the symptoms of fever, you should not rush to reduce the fever first, but you can observe it first. If the fever is low, there is no need to take medicine, and can kill bacteria. However, if the fever persists at a high level and does not go away, you should go to the hospital for treatment.