She was told her perpetually runny nose was from ‘allergies.’ It was a brain-fluid leak.

For years, Kendra Jackson battled an incessantly runny nose — sniffling and sneezing, blowing and losing sleep each night.

Jackson said she initially thought she was getting a cold, then, as her symptoms persisted, doctors suggested it was likely seasonal allergies, putting her among the more than 50 million Americans who struggle with them each year.

But the symptoms never cleared up, and, as the years went by, Jackson started to worry that it might be something worse.

Doctors at Nebraska Medicine in Omaha recently diagnosed Jackson with a cerebrospinal fluid (CSF) leak, a condition in which the watery liquid surrounding the brain spills out through a hole or tear in the skull and then drains into the ears or the nose, according to Johns Hopkins Medicine.