 and lower body temperature, potentially causing migraines over time. It is better to use a hair dryer than to let the hair air dry. That's the first I ever heard of that, but it makes sense. Okay, number five, wet or cold towels on the back of the neck. While this may feel refreshing and cool, it allows cold or dampness to enter the body. If you must stay dry, wipe off the sweat with a towel.