One of the most common sources of headache pain is trigger points in the neck muscles. These muscles are often overloaded from poor posture such as sitting in front of a computer or looking down at you phone for long periods of time. Trigger points that form in the upper traps are the most common trigger points in the body. They refer pain up the neck, behind the ear into the temple. The suboccipital muscles refer pain deep into the skull behind the eye. Sternocleidomastoid trigger points will refer pain to the top of the head and around the orbit of the eye. Trigger points need to be manually released to be resolved.