The suboccipital muscles are a group of four muscles located on each side of the back of the neck just below the base of the skull. The muscles connect the skull with the top two vertebrae of the neck. Located right underneath the occipital bone (the pronounced protrusion of the back of the head), there are four paired muscles as shown in the 
picture.
These muscles are designed to sit right on top of the cervical spine, however, most of us tend to lean forward habitually. Texting, using computers, or even when we eat, we place our ears way forward than our shoulders. As a result, these suboccipital muscles tend to get stretched too much on one wide, crunched up, and stiffened over time. Misalignment of the suboccipital muscles becomes a prime cause of head and neck tension and shoulder aches. Prolonged neck tension may permeate toward the frontal area, causing temple and frontal headaches, and may interfere with the blood flow to the eyes, resulting in painful & burning eye syndromes.