hello and welcome to health care magic. CSF stands for cerobrospinal fluid and it refers to the liquid that surrounds the brain and the spinal cord. Leakage of CSF occurs when there is a history of head injury, in some cases of surgery to the head, brain or spinal cord or spinal tap. Even under these circumstances drainage from the nose and ear is rare. It is unlikely in the absence of head injury or surgery that you are experiencing CSF leak. Symptoms would include light sensitivity, nausea, neck stiffness. In some cases spontaneous leakage may occur in persons with increased pressure in the skull but this increased pressure generally occurs under a number of different circumstances such as head injury, meningitis, a bleed in the brain, stroke and other causes. Each of these conditions would be associated with significant symptoms. With an ear infection, you can have concurrent upper respiratory tract symptoms such as runny nose. You should see your doctor for a full history, examination and appropiate investigation if you are concerned. I hope that you feel better soon.