If you have viral encephalitis, you may have varied symptoms ranging from none to mild, often flu-like symptoms and the illness usually doesn't last long. Other people may experience headaches, irritability, lethargy, fever and joint pain. More serious infections can cause confusion and hallucinations, personality changes, double vision, seizures, muscle weakness, loss of sensation or paralysis in certain areas, tremors, rash, loss of consciousness and bulging in the soft spots(fontanels) of the skull in infants.
Attribution: Avallain