Myth: Headaches are in the brain
Reality: Headaches are thought to be caused by the tension and swelling of blood vessels of the brain. But there are no pain receptors in the brain itself. However, the meninges (coverings around the brain), periosteum (coverings on the bones), and the scalp have pain receptors. Headaches are actually caused by the tightening of the muscles in the neck and the head. Headaches may also be caused by an imbalance in serotonin levels.