Possible causes of neck and shoulder pain include myofasciitis of the neck and shoulder, damage to the trapezius muscle, cervical spondylosis and so on. 1. Neck and shoulder myofasciitis: It may be caused by cold, strain, trauma, etc., which leads to aseptic inflammation of the fascia and muscles of the neck and shoulder, resulting in neck and shoulder myofasciitis and the symptom of pain in the neck and shoulder joint. 2. Damage to the trapezius muscle: It may be due to improper standing posture, long-term work at desk, playing with the cell phone for a long time, which leads to damage to the trapezius muscle and the phenomenon. 3. Cervical spondylosis: prolonged work at desk, playing cell phone with head down, sleeping with pillow too high, or cervical intervertebral disc degeneration may lead to cervical spondylosis and the phenomenon. Neck and shoulder joint pain may also have other reasons, it is recommended to go to the regular hospital in time to improve the relevant examination, clear the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.