In our daily work, we meet children with fever every day, and some of them are especially nervous when they have a fever, even running to several hospitals throughout the day. Most children with fever have upper respiratory tract infections (upper respiratory tract infections), and viruses are the main culprits. The child shows high fever (sometimes above 39 degrees), some children are irritable, crying or less active than usual, with or without nasal congestion and runny nose. The blood test wbc is not high. The upper fever often lasts 3 to 5 days, and the temperature is stubborn and does not subside easily in the first 3 days, after which it begins to decline fluctuatingly, the temperature is easier to control than before, the number of antipyretics needed is reduced, and the spirit improves. Some babies sleep more than before after the disease has improved (mostly in the 3rd to 5th day of the disease), and some parents may think that the child is poor in spirit, but at this time, if the child is breathing steadily, his face is rosy and his hands and feet are warm, this cannot be considered poor in spirit. In addition, it is worth noting that some fevers can last for 7 to 10 days or even longer, when more children with similar illnesses can be found in the same period, which may be related to a specific viral infection in that period. Some parents give their children anti-inflammatory drugs, such as cephalexin and Archie, as soon as the child has a fever. The clinical course of a simple upper infection is generally self-limiting (healing after 5 to 7 days) because it is mostly caused by viruses, and if there are no “complications” after the onset of the disease, the clinical course will not change with or without anti-inflammatory drugs, and what anti-inflammatory drugs are used. or recurrent. At this time, we only need to give the child symptomatic treatment: such as appropriate clothing reduction, more water, indoor ventilation, temperature, humidity, etc., when necessary (generally temperature to 38.5 degrees and above) application of antipyretic agents: such as oral ibuprofen, Tylenol, etc. (Note: Nimesulide is not recommended for children under 12 years of age) treatment can be. It should be emphasized that the infection may be aggravated, spread and delayed in babies who already suffer from rickets, anemia, malnutrition, precordial disease, etc., which should be taken seriously by parents. It should also be noted that the “complications” of upper respiratory tract: 1, the local spread of infection caused by the tissues and organs adjacent to the upper respiratory tract, such as the eyes, ears, mouth, lower respiratory tract and other parts of the infection; 2, the spread of body fluids caused by the infection of tissues and organs away from the upper respiratory tract; 3, immune damage, such as: rheumatic fever, nephritis, etc.. It is not too much to say that “upper sensation is the source of all diseases”. Parents should promptly take their children to the hospital when such problems arise.