My migraines are related to a spinal surgery I had 7 years ago, but exaggerated by PTSD which was set off by a traumatic medical issue related to the migraines that happened last winter. Examples: I recently had a sudden migraine after a car accident, and a sudden one after a panic attack. I also get them often without anxiety. Due to past events, sometimes a migraine can trigger anxiety because I worry that I will wind up in a hospital again. Often, drinking herbal tea, lying down, and minimally reaching for a prescription abortive medication, and resting or limiting motion during the early stages, are how I cope. I saw a specialist at Mass General Hopsital who explained that migraines are a response that your body creates after certain stimuli, and physical fatigue (such as in PTSD) is more of a cause than the mythical "emotional stress" people talk about. I haven't figured them out completely, but he said to treat every migraine as a learning experience to figure out what your body is responding to, so you can have some forewarning before they happen, treat them when they do, and avoid triggers, and not rely too much on medication. Good luck with your migraines everyone!