When the head is not able to tilt back, it may be cervical spondylosis. In cervical spondylosis, the patient may experience muscle contraction spasm in the neck and shoulder, and the patient may cause muscle stiffness in the back of the neck. If the patient’s head is tilted back, headache, dizziness, nausea and vomiting may occur, as well as neck discomfort and shoulder pain and discomfort. Cervical spondylosis includes cervical spine osteophytes, cervical disc herniation and cervical curvature straightening. In the case of young people, most of the cases are considered to be caused by cervical disc herniation and cervical curvature straightening, which are mostly caused by prolonged mental tension, stress or lack of sleep. It may also be caused by incorrect posture, such as when looking down at the cell phone or playing computer for a long time. In the case of elderly people, most of them are considered to be osteophytes. If the cervical discs are herniated and the curvature is straightened, the main treatment is to massage the neck muscles and traction treatment, if it is considered to be cervical osteophytes, you can take oral cervical rehabilitation treatment.