A headache is exactly what it sounds like. The pain can occur in various areas of the head and scalp, as well as in your shoulders. They can be caused by physical impact and injury, or emotional stress. Migraine headaches are a more severe form often accompanied by sensitivity to light and nausea.
A headache involves the nerves in the body. Pain is transmitted through the nerves and wherever the nerves go. Abnormal position of your spinal bones is the primary cause of irritation and inflammation to the nerves in your head, neck and shoulders. Specific spinal corrections will realign the spine and take pressure off the nerves that cause your headaches.