Headaches are a common complaint. Most people have headaches at some time in their lives. But you can't fix all headaches with some over-the-counter pain medicine and a nap. Sometimes your headache is ...

Cerebrospinal fluid (CSF) is a type of clear liquid that surrounds, protects, and cushions your brain and spinal cord from possible injuries. The fluid is held in place by the dura mater, a dense ...