Neck Pain
I often talk to my patients about dysfunction. Dysfunction is when two or more vertebra do not have the proper motion on each other. The advantage of using this sort of diagnosis is that you will not adjust a part of the body that is simply misaligned. Dysfunction is misalignment in addition to lack of proper motion. This creates a very effective and specific adjustment. My patients often tell me no body can adjust my neck and after I adjust it they are surprised. I like to treat patients that no one else can help.
Headache
The reason that chiropractic works so well for headaches is that the suboccipital nerve which supplies nerves to the scalp passes right between the vertebra.