Is it possible to have a csf leak out of both nostrils? I just had a CT scan yesterday. I was diagnosed with Chiari Malformation 11 mm herniation about 10 years ago and at that time I had a CINE MRI done which showed only a small amount of flow anterior to the foramen magnum and a complete blockage posterior to it. Anyways the last year I've developed a constant runny nose (clear watery) which is so frustrating and embarassing. Now they are suspecting I have a leak. But my nose runs out of both nostrils instead of one. SO I'm wondering if that is possible.