 [ Symptoms ] i had phenyl and suffering from throat inflammation please help [ Disease ] you were wise to get this situation checked out because it is possible for a person to leak cerebrospinal fluid csf through a nostril and this is a dangerous situation that can lead to a serious infection of the membranes that surround the brain however since you have had a battery of tests done that have shown the fluid leaking from your nose is not csf then you can rest assured your brain is fine the fluid coming from your nose must be normal mucus many people myself included suffer from a chronically runny nose clear fluid coming from the nose can indeed be caused by allergies there also is an interesting condition called gustatory rhinitis  which is fancy talk for getting a runny nose while eating since your runny nose comes and goes it does sound like it could be seasonal allergies only your health care providers can solve this mystery for you i wish you all the best