Keeping a wrong posture for a long time and lack of exercise, such as playing with the phone with the head down and being sedentary, cause the neck muscles to be in a constant state of contraction, making the joints less mobile or inflammatory. Neck suffocation and discomfort can occur, which can also cause cervical spine osteophytes and cervical spondylosis and neck pain. You can relax the neck muscles through local massage, appropriate activities and change sitting posture to relax the tense and stiff muscles, improve blood circulation, promote nutrient supply to muscles and bones, speed up the excretion of metabolites, such as lactic acid, and reduce neck suffocation discomfort. In addition to feeling swollen neck, also related to the lymph nodes in the neck, thyroid disease, etc., it is recommended to go to the hospital for further examination and clarification.