Feeling bloated in the neck may be caused by chronic strain injury, cervical spondylosis, cervical spondylolisthesis, thyroid cysts and other factors. 1. Chronic strain injury: prolonged exposure of the neck to cold or sleeping in an incorrect posture may lead to damage to the muscles or fascia in the neck area, which may result in swelling of the neck and may be accompanied by mild pain. 2. Cervical spondylosis: prolonged and excessive bowing of the head may induce cervical spondylosis, which may also cause swelling of the neck, and with the aggravation of the lesion, it may also cause neck pain, shoulder pain, upper extremity radiating pain, dizziness and other symptoms. 3. Cervical spine osteophytes: when age increases, the bone in the cervical spine will appear to be hyperplasia, hyperplasia of the bone, causing irritation to the surrounding tissues, can cause neck swelling, may also be accompanied by pain, after the activity, the symptom will be alleviated. 4. Thyroid cysts: may be related to iodine deficiency or excessive intake and other factors, in the early stage, it will cause neck swelling, with the aggravation of the lesion, it will also cause localized pain, neck lumps, dyspnea and other symptoms. If you have a swollen neck with other abnormalities, it is recommended that you seek medical attention for appropriate examination and treatment to control the progression of the disease in a timely manner.