Wives tales have been around for centuries, passed down through generations and believed to be true. One of the most famous is the idea you can catch Pneumonia from a cold & wet head. While it is true that a cold and wet head can make you more vulnerable to catching a cold or flu, there is no scientific evidence that suggests it can cause pneumonia. Instead, it is more likely that an underlying medical condition or a virus can cause pneumonia. It’s important to take precautions when going out into cold weather and make sure you stay dry and warm.