Back of the neck pain may be related to the following causes: 1, there may be a collar injury, which is very common in clinical practice, such as a direct violent blow to the area or a whip-like injury in a car accident, or the patient has hanged himself, resulting in a fracture related to hanging. These conditions can lead to damage to the muscles, ligaments, and bones in this area, resulting in severe pain.2. There may be muscle spasms, often seen in patients with cold in the neck and shoulder area, which can lead to muscle spasms and pain.3. There may be fasciitis of the back of the shoulder. This type of disease is often caused by the patient being cold for a long time or having bad postural trauma, which leads to aseptic inflammation of the deep fascia and causes pain here. 4. There may be cervical spondylosis, for example, during the onset of neurogenic cervical spondylosis, which may cause pain here as well as in the back of the shoulder and upper limbs.