There are several common causes of shoulder and neck hypertrophy: first, the most common cause is excessive weight, obese people will have obvious symptoms of shoulder and neck hypertrophy. Secondly, in addition to the symptoms of shoulder and neck hypertrophy, there is also localized pain and discomfort. This may be due to the impaired blood circulation in the soft tissues of the shoulder and neck. This is especially true for patients who may suffer from cervical spondylosis or cervical disc herniation. If the local osteophytes and herniated discs stimulate the surrounding soft tissues significantly, the symptoms of shoulder and neck hypertrophy will gradually appear. It may also be caused by the straightening of the physiological curvature of the neck. When the physiological curvature of the cervical spine is reduced, straightened, or even the cervical spine is retroflexed, the bony structures on the posterior side of the last section of the cervical spine and the uppermost section of the thoracic spine will protrude significantly, causing the illusion of shoulder and neck hypertrophy.