The tightness and swelling of the neck may be caused by the following reasons: 1. The small joints of the cervical spine are misaligned, which is often seen when the patient suffers a direct violent blow to the neck or has a long-term sitting or standing low head, which leads to the misalignment of the small joints of the cervical spine, and then the patient will have the feeling of tightness and swelling of the neck. 2. 3, caused by bad posture, such as patients sitting and standing for a long time, or have a bad sleeping posture, may lead to the neck in an abnormal arc, over time will lead to the intensification of neck degeneration, and then produce this symptom. 4, cervical spondylosis caused by, if the patient has a long time bad habits, such as If the patient has bad habits for a long time, such as prolonged sitting and standing with head down, cold in the neck, excessive strain on the neck, etc., cervical spondylosis will be induced. This symptom can be experienced in all types of cervical spondylosis, which is the initial symptom of cervical spondylosis. 5. It may also be caused by enlargement of the thyroid gland and lymph nodes in the neck.