Hi. So, do you have a 'cold'? While covid-19 is scary, I don't think your runny nose is a symptom. In fact, that's listed as rarely and more along the lines of basic cold symptom on comparison charts. Cough, fever and shortness of breath, hallmarks of covid-19. Anyway, are you worried this is spinal or cranial/brain fluid leaking? (since you in the Neuro community)? I don't think this is all that common but it IS described as salty and clear as yours is. Here's an article on it. https://www.healthline.com/health-news/how-could-a-brain-fluid-leak-be-mistaken-for-allergies#4 Have you hit your head or anything? I would monitor it and if it keeps happening, I guess check in with your doctor. This is such a crazy time and going to your doctor unless they say you should should be avoided. (you don't want to get sick with covid-19 on top of anything else going on). Read through that and see if it rings a bell. I have had a runny nose myself recently and found I also swallowed a good deal. But it was right after a sore throat so I related it to a cold. But you sound like you don't have any other symptom?
I don't have an answer for you but it sounds like the weird problem I'm having. I think I have a nosebleed but am not quick enough to get a Kleenex before my right nostril turns into a water faucet & it soaks everything around me. The liquid is clear & watery. When dried it's like nothing was ever there, it completely vanishes. I woke up one morning after falling asleep in a weird position with my head back & when I bent forward, I covered my arms, pillowcase & sheets in that liquid from my right nostril. This has happened 5 times in the last month. I have a runny nose 60% of the time. I had 2 septoplasties in 2005 which made my beautiful nose ugly. Then there's my car accident in 2006 where I was knocked out & had a small brain bleed. The doctors I've asked about this are clueless & I feel like a hypochondriac now, but I know what's happening is not normal. Please, if you've found an answer I'd be forever grateful to hear it? Thank you & I wish you well!