The bulge between the neck and shoulders, this place is the place of the trapezius muscle, the most common is the trapezius muscle inflammation, edema caused by the inflammation of the trapezius muscle, edema, can be caused by two reasons. The first situation may be long-term low head work, life or often low reading, reading cell phones, which leads to muscle strain in the trapezius muscle, time will slowly appear local aseptic inflammation, stimulate the local trapezius muscle swelling, pressure and pain and other symptoms. The second situation may be cervical spondylosis caused by degenerative changes in the cervical spine compression of the left side of the nerve root, which will cause the left side of the neck, shoulder and back nerves pulling pain, and thus the pain stimulation will affect the inflammation of the trapezius muscle edema, there will be a bulge in the place, the symptoms of pain.