Although headaches can be due to a wide variety of causes, such as drug reactions, temporomandibular joint dysfunction (TMJ), tightness in the neck muscles, low blood sugar, high blood pressure, stress and fatigue, the majority of recurrent headaches are of two types: tension headaches (also called cervicogenic headaches) and migraine headaches. There is a third, less common, type of headache called a cluster headache that is a cousin to the migraine.
Numerous research studies have shown that chiropractic adjustments are very effective for treating tension headaches, especially headaches that originate in the neck.
A report released in 2001 by researchers at the Duke University Evidence- Based Practice Center in Durham, NC, found that "spinal manipulation resulted in almost immediate improvement for those headaches that originate in the neck, and had significantly fewer side effects and longer- lasting relief of tension- type headache than commonly prescribed medications." These findings support an earlier study published in the Journal of Manipulative and Physiological Therapeutics that found spinal manipulative therapy to be very effective for treating tension headaches. This study also found that those who stopped chiropractic treatment after four weeks continued to experience a sustained benefit in contrast to those patients who received pain medication.
Each individual's case is different and requires a thorough evaluation before a proper course of chiropractic care can be determined. However, in most cases of tension headaches, significant improvement is accomplished through manipulation of the upper two cervical vertebrae, coupled with adjustments to the junction between the cervical and thoracic spine. This is also helpful in most cases of migraine headaches, as long as food and lifestyle triggers are avoided as well.