: Inflammation that causes the brain to swell, potentially leading to severe neurological dysfunction or long-term complications. Primary Causes :

: High temperature, seizures, personality changes, difficulty speaking, and loss of consciousness. Acute encephalitis – diagnosis and management - PMC - NIH

ABSTRACT. Encephalitis, inflammation of the brain, is most commonly caused by a viral infection (especially herpes simplex virus [ National Institutes of Health (.gov) Encephalitis - Symptoms, diagnosis and treatment

: Most commonly caused by viruses like Herpes Simplex Virus (HSV), West Nile virus, or Varicella-Zoster (chickenpox/shingles).

: Occurs when the immune system mistakenly attacks brain cells, often triggered by a previous infection or certain cancers (paraneoplastic syndromes).