When a fistula is especially severe, it may result in a CSF leak, as the perilymph of the inner ear is contiguous with spinal fluid. CSF leaks mainly are a consequence of head injury or surgery (for ...

A positional headache is one that occurs when sitting or standing and improves when lying down. Bending, sneezing, lifting, and straining may also cause it. It often results from a leak of ...