A low fever is a fever with an oral temperature between 37.4°C and 38°C or an axillary temperature between 37.1°C and 38°C. If the low fever lasts for more than 1 month, it is called a long-term low fever. Low fever in children is mostly caused by cold, flu, and upper respiratory tract infection. Pay attention to the presence of cough, coughing, runny nose, sore throat, and other symptoms. If the baby is in good spirits and has no obvious self-conscious symptoms, you can first give antipyretic and antiviral drugs, and at the same time carry out physical cooling, you can use warm water baths, cold towels on the forehead, and topical antipyretic patches. If the fever is not caused by a cold, you can first give the baby water and observe the change in body temperature. If the low fever lasts for a long time, you need to go to the hospital for a timely examination to exclude tuberculosis and malignant tumors. Usually, children with low fever do not need to take antipyretic drugs because their thermoregulatory centers are not well developed and are prone to hypothermia (below 36°C) after using antipyretic drugs below 38°C. However, it is important to feed the baby more water during the period of low fever to promote metabolism and excretion in the body. If the baby has chills or fever, parents need to add or remove clothing for the child in a timely manner. During the period of low fever, try not to take your baby out of the house or go to crowded places to prevent getting cold or having cross infection.