Tis the season for sneezing, so it’s no surprise that you’ve developed a non-stop runny nose. But what’s triggering this annoying trickle--is it just a common cold or could it be something more? Is the color or consistency of your snot confusing you even more? You’re not alone. We understand that a consistently running nose can be uncomfortable--and concerning. To help you pinpoint potential causes, we asked an expert. Here, her savvy insights.