People who suffer from migraines are more likely to have symptoms of post-traumatic stress disorder (PTSD) than the healthy population, a new study has found. Migraine studied 593 adults with migraine and found that 30 percent of those who had daily headaches, and 22 percent of those who had periodic migraines, also had PTSD. Experts say this is significant since only 8 percent of adults in general have PTSD, and it may be related to the fact that 42 percent of the study's migraine sufferers...