The tendon on one side of the neck keeps pulling, which may be caused by falling pillow, or cervical spondylosis, back myofasciitis and other diseases. 1. pillow fall: refers to the night sleep pillow is not suitable or sleeping posture is not appropriate, causing local muscle stiffness, which leads to the neck can not be normal activities, the neck will be biased to one side. 2. Cervical spondylosis: a clinical syndrome caused by cervical degenerative disease. If the onset of a longer period of time, some patients will feel a tendon in the neck pulling, unable to move normally, and there is a clear sense of pressure. 3. Dorsal fasciitis: mostly caused by chronic strain injury, the onset of trigger point pain may occur, the symptoms may involve the neck, easy to lead to the neck side of the tendon pulling. If the symptoms persist and there is obvious stiffness, it is recommended to consult orthopedics or pain medicine as soon as possible, analyze through X-ray examination, and standardize the treatment under the guidance of the doctor.