[Wylie's Mom]

You probably covered this in the past...but have you considered allergies? Even if she would test negative for allergies, sometimes the nose can still drip from being sensitive, but not allergic, to enviro/seasonal stuff.

Just thought of this too....my nose was dripping for almost a year, and I tested negative for allergies. They finally wanted an MRI and found a little maxillary cyst. It wasn't worrisome enough for them to remove. I actually think the cyst eventually drained on its own, bc my nasal drip finally just stopped.