In-depth

Symptoms

Headache

Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.

Nausea and vomiting

Tests and diagnosis

CT scan

Eye exam

Eye exam — Overview covers definition, what to expect and results of vision testing.

Lumbar puncture (spinal tap)

MRI

MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.

Feb. 01, 2014