According to the American Chiropractic Association, nine out of 10 people suffer from headaches. Did you know chiropractic care may help reduce headaches? Headaches can come on for many reasons. Tension headaches are typically caused by stress and usually occur in the afternoon to evening. Muscle tightness associated with tension headaches, may cause a decrease in range of motion and increase in stiffness. Migraine headaches are vascular headaches, meaning that they occur due