Fever refers to an abnormal increase in body temperature. The normal body temperature of a child, axillary temperature is 36-37 degrees, if the axillary temperature of a child reaches 37.5℃ and some symptoms and signs appear, the child can be diagnosed with pathological fever. Generally 37.5-38℃ is low fever, 38.1-39℃ is moderate fever, 39.1-40.4℃ is high fever, and <40.5℃ is ultra-high fever. Body temperature below 38.5 ℃ treatment: 1, warm water bath. 2, more ventilation, pay attention to heat dissipation, dress generously, avoid wrapping with quilts. 3, drink more water. Body temperature greater than 38.5 degrees, consider using antipyretic drugs. 1.Paracetamol: no more than 4 times a day. The interval is about 6 hours, generally use no more than 3 days. 2. Ibuprofen: For children over 6 months of age, the dose is 5-10 mg/kg body weight/dose every 6-8 hours. Commercially available are ibuprofen granules, suspensions of ibuprofen, etc. 3. Pediatric antipyretic suppositories. Do not take more than 4 times of each antipyretic in 24 hours.