A low-grade fever that does not go away for two days is usually not dangerous. Fever is usually caused by an infectious disease, mainly due to a stress reaction that occurs in the body after a virus or bacteria invades the body. When the fever is low, the pathogens are easier to kill and do not have a significant impact on health. Low fever can be reduced by physical cooling methods, such as antipyretic patches and warm towel baths. Low-grade fever is usually not life-threatening within a week, but if it is repeated and accompanied by severe clinical symptoms, such as cough and runny nose, it is recommended that the cause of the infectious disease be identified as soon as possible, and that anti-infective treatments, such as amoxicillin and cephalosporin, be used. If there is a prolonged low or high fever, it is recommended to consult a doctor to take appropriate treatment to avoid delaying the condition.