Encephalitis is an inflammation of the brain, often caused by viral infections, but it can also result from bacterial infections, autoimmune diseases, or other factors. Symptoms may include fever, headache, confusion, seizures, and neurological disturbances. It can lead to serious complications, including permanent brain damage or death, making prompt diagnosis and treatment crucial. Treatment typically involves antiviral medications, supportive care, and sometimes corticosteroids to reduce inflammation.