It is usually recommended to consider the use of antipyretic drugs for treatment when the human body temperature exceeds 38.5°C. Generally, when the body temperature is below 38.5℃, physical cooling can be considered first. Therefore, when the body temperature is 38.4℃, you can consider using physical cooling methods for fever reduction treatment. Usually, warm water can be used to increase the heat dissipation from the body surface to achieve the purpose of reducing fever and cooling. You can also use a local cold compress on the forehead, or use an ice pack on the forehead for cold compresses for symptomatic treatment of fever. In the process of fever, patients will lose a lot of body water, so during the fever period, we need to pay attention to replenish enough water to keep the body hydrated, and we need to closely monitor the body temperature and observe the changes in the patient’s condition.