Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.
Tests and diagnosis
MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.
July 16, 2015
- Naegleria fowleri — Primary Amebic Meningoencephalitis (PAM) — Amebic Encephalitis. Centers for Disease Control and Prevention. http://www.cdc.gov/parasites/naegleria/index.html. Accessed June 4, 2015.
- Seas C, et al. Free-living amebas. http://www.uptodate.com/home. Accessed June 4, 2015.
- Naegleria fowleri — General information. http://www.cdc.gov/parasites/naegleria/general.html. Accessed June 4, 2015.
- Naegleria fowleri — Treatment. http://www.cdc.gov/parasites/naegleria/treatment.html. Accessed June 9, 2015.
- Steckelberg JM (expert opinion). Mayo Clinic, Rochester, Minn. June 9, 2015.