<unk>  is characterized by chronic, recurrent episodes of headache, stiff neck, meningismus, and fever; cerebrospinal fluid (CSF) pleocytosis with large "endothelial" cells, neutrophil granulocytes, and lymphocytes; and attacks separated by symptom-free periods of weeks to years; and spontaneous remission of symptoms and signs. Many people have side effects between bouts that vary from chronic daily headaches to after-effects from<unk>  such as hearing loss and visual impairment, nerve pain and twitches. Symptoms may be mild or severe. Some cases may be short, lasting only 3–7 days, while others last for weeks to months. While herpes simplex and varicella can cause rash,<unk> 's patients may or may not have a rash. Herpes simplex virus is likely the most common cause of<unk> .
Mollaret's meningitis
Rasmussen's encephalitis
La Crosse encephalitis
Fungal meningitis
Brain fever
Japanese encephalitis
Eastern equine encephalitis
Sappinia amoebic encephalitis