Bacterial fever in children is characterized by generalized weakness, drowsiness, dizziness, nausea, poor mental health and other symptoms, and routine blood tests may show an increase in the proportion of white blood cells and neutrophils, and the C-reactive protein and blood sedimentation may also have different degrees of increase. If the child’s immunity is reduced, he/she is susceptible to bacterial infections and develops bacterial fever, sometimes the body temperature can be as high as 39℃ or more, and the child may be accompanied by generalized weakness, drowsiness, nausea, sore throat, chills, cold and drowsiness, etc. Some of the affected children may have decreased appetite, generalized body aches and pains, loss of appetite, and poor mental condition. When the child undergoes laboratory tests, the type of infection can be clarified by blood tests. Children with bacterial infections may have an increase in C-reactive protein and sedimentation rate to varying degrees, as well as an increase in the proportion of leukocytes and neutrophils with a leftward shift of the nucleus. If a child develops a fever, parents should take the child to a hospital to identify the cause of the illness and provide targeted treatment.