It is necessary to determine the cause of fever according to the accompanying symptoms, duration of fever, clinical manifestations after fever, auxiliary examination, etc. The cause of fever is usually considered to be upper respiratory tract infection.
1: fever accompanied by symptoms: if the fever is accompanied by nasal congestion, runny nose, mostly consider the upper respiratory tract infection; if the fever is accompanied by cough, shortness of breath, dyspnea, mostly consider the lower respiratory tract infection.
If fever accompanied by frequent urination, urinary urgency, urinary pain, mostly consider urinary tract infections; if fever accompanied by vomiting, diarrhea, abdominal pain, abdominal masses are mostly considered digestive system infections or surgical diseases, such as fever accompanied by convulsions, headache, vomiting, mostly considered neurological diseases.
2: fever course: acute short-term fever is mostly due to infectious factors; long-term fever is mostly due to tuberculosis, rheumatism, autoimmune diseases.
3: post-fever manifestations: such as infants and young children, fever and rash out of the consideration of early childhood emergency rash.
4: auxiliary examination: such as blood routine, white blood cells, neutrophils increased generally consider bacterial infection; white blood cells normal or reduced, and monocytes increased consider viral infections, but there are exceptions, such as typhoid fever and other diseases.
In conclusion, the causes of fever in children are diverse, and cannot be diagnosed simply by fever, but also need to consult a doctor in a timely manner, combined with the child’s clinical manifestations and laboratory tests to clarify the cause.