If the fever does not go away, you need to take antiviral drugs quickly. I am afraid that the effect of ordinary antiviral drugs is not enough, so you need to take oseltamivir, but oseltamivir has serious gastrointestinal irritation, so it must be taken after meals, not on an empty stomach. If you are an adult, you can also take omeprazole to protect the stomach mucosa. If the body temperature is above 38.5 degrees, you should take antipyretic medication for treatment. Adults and children can take ibuprofen suspension, usually after an interval of 4-6 hours, you can repeat the dose once, and not more than 4 times a day.