Neck pain on the right side of the head half of the pain may be caused by the fall of the pillow, stay up late and other physiological reasons, may also be caused by cervical spondylosis, occipital neuralgia and other pathologic factors. 1. Physiological reasons: if the pillow height is not suitable or the body maintains a fixed sleeping position for a long time, it may lead to the occurrence of pillow fall, clinically known as acute neck and shoulder myofasciitis, which can lead to neck pain, and severe patients can lead to pain on the affected side of the head; in addition, people who stay up all night for a long time, and the body is in a subhealthy state, the above symptoms may also occur. 2. Pathological factors: when cervical spine degenerative disease leads to cervical spondylosis, it may lead to instability of the vertebral body and the emergence of bony cumbersome, calcification of the collateral ligaments, nerve compression, myofascial rigidity and so on, which will cause the above mentioned symptoms; the occipital nerve compression or excessive tension caused by various reasons will also lead to the symptom of neck pain accompanied by headache, such as arthritis of the upper cervical spine and infections, etc. If the pain symptoms are severe or persist, or the symptoms continue to be severe, it may lead to neck pain and headache. If the pain symptoms are severe, or if the symptoms continue without improvement, you should go to the hospital in time for treatment.