If an infant develops a fever that is not particularly severe below 38.5°C and is caused by a common viral infection, the child’s fever can usually be completely relieved and the temperature can go down after 3-5 days. In the case of more serious viral or bacterial infections that are not treated regularly, the fever may last for a long time and often the temperature does not go down. If regular treatment is carried out, the temperature can generally be completely relieved in 7-10 days, for example, if there is a fever caused by a cold virus, drink more water, the fever symptoms are not very heavy, and the child can recover from the cold and fever symptoms in 3-5 days. If it is more serious, treatment with medication can also help lower the temperature and promote healing of the disease. For example, while taking Pu Di Lan Anti-inflammatory Oral Liquid and Blue Scutellaria Oral Liquid for treatment, the temperature can also generally go down in 3-5 days. In addition, if the fever is particularly severe, you need to go to the hospital for medical consultation.