Many of us have been told that if we go outside with wet hair, we’ll get sick; however, this is just a myth (not true). Since colds are caused by viruses, you can’t get sick this way. However, if you go outside with wet hair when the temperature is cold, you’ll likely feel uncomfortable, and since your hair keeps your head warm, you will likely feel chilly too. You can help your immune system fight off viruses such as colds by eating balanced meals and healthy snacks, getting about 9 hours of sleep every night, and exercising 60 minutes every day.