There are two common types of headaches as described by modern medical science: tension headaches and migraine headaches. While tension headaches are not as severe as migraines, they can still be just as painful and debilitating, popping up unexpectedly and making a normal routine difficult.
Tension headaches are often caused by nerve activity at the base of the skull and near the forehead above the temples. Poor posture, stress or prior trauma affects muscles near the spine, which in turn trigger nerve reactions.
The most common type of condition that leads to regular tension headaches is a recurring spasm in the rectus capitis posterior minor (RCPM) muscle, located along the neck. Spasms in this muscle affect its tendon attached at the base of the skull to a thin, protective tissue called the dura mater. The dura mater is covered in sensitive nerve endings, so RCPM spasms can trigger a broad, dull sense of pain that leads to a headache.
Another source of tension headaches is found in sternocleidomastoid (SCM) muscles on the side of the neck, most commonly affecting those with a history of whiplash injury.
By correcting subluxations in the top two cervical muscles near the base of the neck, muscle tension and spasm can be relieved, eliminating the root cause of tension headaches.