How long a child sleeps after the fever is gone does not determine whether there is encephalitis or not, there is not much connection between the two, generally need to be examined by cranial magnetic resonance to determine whether there is encephalitis or not.
Some children do not sleep well during the illness, rest is not good, in the fever may appear drowsy state, sleep more time, but not necessarily encephalitis, there is not much connection between the two, encephalitis generally need to be examined by cranial magnetic resonance, to see whether there is cerebral edema, and so on.
After suffering from encephalitis, in addition to drowsiness, it will also show other symptoms, such as headache, vomiting, wind and other symptoms, consciousness may be more blurred, as well as neck resistance.
It is recommended that children who are drowsy after the fever has gone down should be taken to the hospital for relevant examinations to rule out encephalitis and to identify the cause of the disease and then treat it actively.