If the fever does not go away in adults, the following methods can be used: First, the cause must be found for the treatment of the cause, to the hospital for blood tests and ultrasensitive C-reactive protein, to determine what kind of pathogens are infected, such as bacterial infections must apply antibiotics, viral infections must apply antiviral drugs, atypical pathogens must be symptomatic selection of the most correct drugs to make the fever go away as soon as possible. Secondly, adults who have been running high fever should also rule out other types of diseases, such as immune system diseases, connective tissue diseases, and need to do cellular and humoral immune examinations, and special viral examinations to rule out other viral infections such as syphilis spirochetes and AIDS antibodies. Thirdly, adults who have been suffering from high fever can apply non-steroidal antipyretic and analgesic drugs, such as ibuprofen, Advil, Advil, etc., to reduce fever first. Fourth, the application of physical cooling methods, warm water wipe can also first reduce fever, but the treatment of the cause is the root.