How to recognise CSF - cerebrospinal fluid leak

DBMI on a BBC story about CSF "Four years ago David Baldwin woke up with a crippling headache that has completely changed his life. David, from Ross-shire, can no longer sit up or walk without experiencing excruciating pain and he must avoid laughing or sneezing because they are a risk to his health. The condition occurs when fluid leaks from the membrane that surrounds the spinal cord or brain, leaving the brain less supported. It can be caused by trauma or surgery, such as receiving an epidural during childbirth, and its effects can be devastating." for full article click here