There are many causes of fever, generally including infectious fever and non-infectious fever, the former including various pathogens such as viruses, bacteria, mycoplasma and other infections, the latter including hypersensitivity reactions, endocrine and metabolic disorders, reduced skin heat dissipation and thermoregulatory central dysfunction or developmental insufficiency, etc. The treatment of different causes is also different, so symptomatic treatment is needed. If the temperature of infants and young children does not exceed 38.5 degrees Celsius, if there are no other related complications, temporary observation, because physical cooling may cause obvious discomfort to the child, has been clearly not recommended, so in the child’s fever, try not to use warm water, alcohol rubbing, cold towels on the head, or ice packs and other physical cooling methods. For children under the age of one month, you can consider reducing clothing, as long as the fever appears, it often indicates that the infection is more serious, you need to carry out the relevant blood routine, various infection indicators and other tests, if necessary, anti-infection cooling rehydration treatment; In addition, changes in the temperature of the external environment can also lead to changes in the body temperature of infants and young children, mainly due to the imperfect development of the thermoregulatory center of infants and young children, this Once again, diseases such as immune disorders can also lead to disorders of body temperature metabolism and reduced skin heat dissipation resulting in fever, which is generally seen in addition to fever and symptoms of immune disorders, but is hardly considered in children under the age of one month. Therefore, there are many causes of fever, so pay attention to specific treatment according to the specific cause, usually pay attention to warmth, protection from external germs, pay attention to diet, and if necessary, conduct relevant tests to clarify the diagnosis and treatment.