This is a serious condition that can cause headaches, seizures, or meningitis. A CSF leak needs to be treated by a medical professional. Cerebrospinal fluid (CSF) is a clear liquid that surrounds ...

Patel, adding that 10 to 25% of people with an active posttraumatic CSF leak develop meningitis, a potentially fatal inflammation of the brain. Your headache, neck stiffness, or runny nose are ...