Ever notice that your nose gets a bit runny when temperatures drop outside? There’s a reason for that. For many, a runny nose is an unfortunate part of winter. About 50 to 90 percent of people get a runny nose when it’s cold outside. But it’s not a sign that you’re getting sick, it’s just a side effect of your body warming up cold, outside air before passing it on into your lungs. It’s called “cold-induced rhinitis”, or “skier nose”, and it’s a completely healthy — albeit annoying — part of your body’s ability to regulate the humidity of the you breath. It’s the job of your nose to make sure that the air you breath is warm and humid so that it doesn’t irritate your lungs. When breathing in freezing temperatures, the air in the back of the nose always hovers around 79ºF (and as high as 86ºF), while the humidity is usually 100 percent,…