If you’re dealing with a nagging headache or a painful noggin-splitter, all you want is for it to disappear — fast! Here, doctors share their advice on how you can stop the pain in as little as 30 seconds — with no expensive prescription medicines! “If you need a quick fix, stretching exercises can give quick relief with no equipment necessary,” said Dr. Michael Rowe from Spine Care in St. Joseph, Mich. There are small muscles in the base of the skull called suboccipital muscles that get irritated by cell phones or driving or lots of things we do in the modern world, doctors say. And we can ea…