The common cause of pain when the right side of the neck is moved is localized cervical spondylosis, which is clinically manifested as restricted neck movement, stiff neck muscles, and passive neck position, and its causes are as follows: first, injury to the neck muscles occurs, which produces spasm and pain symptoms in the neck muscles; second, subluxation of the small joints of the cervical spine occurs, and the cervical spine curvature changes, causing pain and stiffness in the neck; third, the cervical spine causes pressure on the posterior branch of the nerve root, which Fourth, when the cervical intervertebral disc protrudes backward, the peripheral fibrous ring is damaged and stimulates the sinus vertebral nerve, which can also cause neck muscle pain, spasm, and limited cervical movement. After physical therapy, rest, local hot compresses and massage on the cervical spine, the pain and spasm symptoms can be relieved.