The fever is complicated, can be largely classified into the following categories : 1, infectious By including viruses, bacteria, rickettsia-, protozoa, spirochetes, such as mold caused by acute infection of the upper respiratory tract infections, bronchitis, pneumonia, septicemia and various acute infectious diseases, are among the common causes of fever. 2, non-infective (A) Organization aseptic necrosis or destroyed : such as leukemia, vascular embolization, burns, fractures, hematomas, abdomen or chest to the blood absorption. (2) the large loss of blood or LOCA : can effectively reduce blood circulation where Thermal barrier, thus the temperature increased, but the event of circulatory failure, normal metabolism stagnation, and heat production is too small, but the temperature did not rise. (3) thermal heat anomaly : If seizures and status epilepticus caused by the excessive heat production; Because of extensive Ichthyosis and breadth of dermatitis, with no sweat glands or packages covered too restrictive due to the thickness of heat disorders. (4) biological agents or drug reaction : If serum, vaccine, heterologous protein or certain drugs (such as sulfa, Barbiturates, etc.) allergies. (5) Adjustment disorders center : as some functional low heat and temperature adjustment disorders center, indoor summer high temperature, neonatal development of a relative shortage of sweat, heat worse, it may result in fever. (6) other causes of fever in children : dehydration as heat, high incidence of birth after more than four to five days, mainly milk and enough water to feed Also, from the respiratory tract, skin, urine lost a lot of moisture, so that children with serious water shortage. The temperature can be as high as 39 ~ 40 ° C, children crying or curl up to sleep, the former skull subsidence, poor skin elasticity, oral mucosa dry, mild decrease in urine dehydration, a few hours after the most sustained gradually cooling, can be a fever several days, but few consecutive days of fever dozens more. Also, as the emergence of a nuclear children with jaundice (jaundice caused by excessive encephalopathy), intracranial hemorrhage (birth injuries) sequelae may cause fever.
