They can have several causes: Certain head, brain, or spinal surgeries Head injury Placement of tubes for epidural anesthesia or pain medicines Spinal tap (lumbar puncture) A spontaneous CSF leak ...

a sample of your cerebrospinal fluid is retrieved. The most common way to attain a sample is through a lumbar puncture, also known as a spinal tap.‌ Spinal taps can be unnerving or uncomfortable ...