Medications work well for the occasional headache, but experts say chronic over-the-counter medication use can backfire for those who suffer more often. This constant use can case "rebound" headaches, they say. In this article from CNN, experts talk about the particular pain of tension headaches--a type often brought on by stress. They recommend some alternative therapies, such as acupuncture, meditation, and even mouth guards as methods that may help lessen the vice-grip pain of tension...