Q. Why does our nose starts to run when it's cold?
Ans. Every one of us might have experienced the cold winter night and the running nose due to cold. Have you ever thought why does it happen? In winters, the air around us is cold, but the lungs require a typical warm air for its functioning. So there will be an increased blood flow to the nose, which keeps the air intake warm. But it has a side effect, i.e., the production of a high amount of snot from the mucus secreted by the glands in the nose. This is why the nose oftenly runs in the winters.