A hole or tear in the brain lining and the bone separating the brain and the sinuses will result in the drainage of the cerebrospinal fluid or CSF that normally surrounds the brain into the sinuses. Drainage of CSF into the sinuses can result in a multitude of problems, not to mention the annoyance of constant nasal dripping. Cerebrospinal fluid leaks, regardless of cause, are conditions that should be addressed by a rhinologist as soon as identified in order to avoid long-term complications such as meningitis, brain abscess (pus in the brain), and other infectious complications.