There is a incomplete sealing of the dura mater and is a major complication of intradural procedures.
CSF leaks have been traditionally classified as traumatic or non-traumatic.
This can be caused by several reasons, including spontaneous cerebrospinal fluid leak, post-surgical lumbar puncture (iatrogenic), physical trauma, etc.
It is a common complication of surgery involving the lumbar spine.
While high CSF pressure can make reclining unbearable, low CSF pressure due to a leak is often relieved somewhat by maintaining a supine position.
Spontaneous cerebrospinal fluid leak or nontraumatic.