If you go outside with wet hair, you’ll catch a cold
Surveys have suggested that as many as 40% of parents tell their children this. However, wetness really has nothing to do with it; far more important is being exposed to a cold virus. A link has been found to cold weather drying out your nasal lining, making you more susceptible to 1 of the 200 or so viruses known to cause colds. Coupled with a tendency to stay indoors, close to other people who may be carrying the virus, and you have a potent cold-inducing combination through the winter months, but wet hair really has nothing to do with it.