Aseptic herpetic meningitis is a clinical syndrome characterized by fever, headaches, confusion, and a combination of meningeal signs. The spinal fluid findings consist of an increase in mononuclear cells (mononuclear pleocytosis), increased protein concentration, and normal glucose concentrations. Aseptic herpetic meningitis is thought to be caused by a viral infection, although the specific virus is usually not demonstrated. The condition is self-limited and requires no treatment.