At first, doctors just said that a Nebraska woman's runny nose was caused by allergies, plain and simple. But the woman, Kendra Jackson, knew it had to be something else. In 2013, Jackson was in a car accident, and she hit her face on the dashboard, according to KETV-7 ABC. Several years after that, her symptoms started: an endless runny nose, painful headaches and trouble sleeping. ... It wasn't until Jackson saw an ear, nose and throat specialist at Nebraska Medicine in Omaha that she learned her runny nose wasn't from allergies, but in fact cerebrospinal fluid (CSF) leaking from...