The back of the spine in the middle of the bulging bag, consider the back of the neck is also commonly known as the “rich bag”. There are three main causes of this big bag: one is fat accumulation, generally seen in obese people, because the fat accumulation at the back of the spine looks like a large bag. The second consideration is cervical spine damage, cervical spine damage caused by changes in the physiological curvature will make the back of the person looks like a big bag, common causes are long time low head playing cell phones, low head looking at the computer, sleeping with an inappropriate pillow or incorrect posture during sleep, it is due to this long-term bad habits accumulate over time, resulting in this deformity of the cervical spine changes. The third consideration is ligament calcification adhesions such as long-term ambulatory work, incorrect posture, ligament wear by the cervical spine resulting in local sterile inflammation, ligament tissue calcification adhesions, over time the formation of a large bag.