The basic components of brain cells are proteins, and proteins are usually not gradually destroyed until they are above 42 degrees. General fever rarely exceeds this temperature, so there is no need to worry about heat damage to the brain. Unless the fever is caused by encephalitis or meningitis, it can cause brain damage. Fever itself is not scary, the important thing is to find the cause of the illness and treat it. Usually a fever lasts for 2-4 days, but if you are active and eating normally, you don’t need to worry too much. However, it is necessary to pay attention to the worsening of the infection or the occurrence of complications, such as crying, poor mobility, high fever, refusal to eat, convulsions, etc. in infants and young children should be consulted as soon as possible. Usually, general filtering viral infections will be cured without antibiotics, and you should not ask your doctor to prescribe antibiotics because it is easy to cause the development of drug-resistant strains of bacteria. Parents should inquire carefully about the indications and duration of use when recommended by the physician.