A fever that does not go away for a few days is usually not dangerous, but the cause of the fever needs to be further clarified for targeted treatment. If the fever is caused by common cold, the course of the disease is usually about 5-7 days; if the fever is caused by epidemic virus, the course of the disease is usually about 10 days, and the cycle can be shortened by medication. When you have fever, you need to drink more water, which is good for the discharge of sweat, you can supplement vitamin C, which is good for the recovery of cold and fever, try to avoid going to places where there are many people to prevent cross-infection, and be alert to the occurrence of convulsions and dehydration caused by high fever. You can take oral anti-cold medicine cold spirit granules, which can treat and relieve various symptoms caused by common cold. You can also take oral Chinese medicine, such as Pu Di Lan Anti-inflammatory Oral Liquid, Blue Scutellaria Oral Liquid, etc. to clear the heat and detoxify the toxins. If the fever is caused by epidemic virus, you can take Oseltamivir phosphate capsules orally, which can prevent and control influenza virus. If the body temperature exceeds 38.5 degrees, you can take ibuprofen suspension orally, which has antipyretic and analgesic effect. If the fever persists, you can use the medicine once in 4-6 hours, no more than 4 times a day.