Aseptic meningitis is a benign condition often triggered by a virus or an immunological process. For example herpes virus, borrelia, tuberculosis, a fungus or an autoimmune disease may underlie meningitides presenting prolonged or recurrent symptoms. It is essential to identify the meningitis patients among the diverse group of headache patients and carry out focused investigations and treatment, and in mild cases to avoid complications caused by the investigations. Analgesic and antiemetic medication are usually sufficient for symptomatic treatment. Etiological treatment is available for some patients.