Encephalitis is inflammation of the brain usually caused by a viral infection. Severe cases can cause brain damage, even death.
Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.
Foot pain? Headache? Sore throat? Skin rash? Use the Symptom Checker to find out what's causing your symptom.
Tests and diagnosis
MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.
Dec. 16, 2015
- West Nile virus. Centers for Disease Control and Prevention. http://www.cdc.gov/westnile/index.html. Accessed Oct. 4, 2015.
- Petersen LR. Clinical manifestations and diagnosis of West Nile virus infection. http://www.uptodate.com/home. Accessed Oct. 4, 2015.
- Petersen LR. Treatment and prevention of West Nile virus infection. Accessed Oct. 4, 2015.