Infant encephalitis causes, as follows: First, the baby is relatively young, the immune function is relatively poor, it is easy to be infected by some pathogenic bacteria and the formation of disease, usually suffer from pneumonia, gastrointestinal digestive diseases, or encephalitis, etc., are due to their own immune function is relatively poor. Secondly, because the blood-brain barrier of infants is not very perfect, when infected by some pathogenic bacteria, it is easy to violate the brain cells, thus forming encephalitis. When the baby clearly suffers from encephalitis must be given treatment, should be based on the pathogenic bacteria causing encephalitis to give treatment, at the same time according to whether the cause of intracranial pressure increase, as well as whether there are some limbs behavioral abnormalities of the changes, to give targeted symptomatic treatment, and at the same time, if necessary, to give the nutritional brain cell treatment, to avoid the formation of encephalitis aftermath.