Runny nose is a common occurrence which is usually caused by sinus infections, allergies, or common cold. However, on rare occasions it can indicate a much more serious underlying condition - a leak of Cerebrospinal Fluid (CSF) from the brain. Since CSF is essential for maintaining integrity of the brain and spinal cord, its leakage poses serious health risks. It comes with symptoms like excruciating headaches, infections, and even nervous system damage. It is critical to understand the origins of a CSF leak and to identify its symptoms in order to avoid further complications.
We use the term "CSF Rhinorrhea" to describe discharge of CSF through the nose. It manifests as sporadic, frequently positional discharge of clear fluid from nose. Sometimes traces of blood can be found in it. A list of medical causes behind CSF leaks that need immediate attention are:
