The pain of paroxysmal cramps in the back may be caused by the following reasons: First, it may be caused by myofasciitis in the back, which is usually caused by long-term forceful lifting of the back muscles, or forceful physical exercise, resulting in local muscle strain, and over time, local myofasciitis will appear. Second, it is possible that the small joints of the thoracic vertebrae are misaligned, compressing the nerve roots of the back and causing this situation may be caused by trauma, or may be caused by incorrect posture when sleeping, generally you can go to the massage department and find a specialist to give a manual reset, the symptoms can immediately improve. Third, there may be some degenerative changes in the cervical spine caused by cervical spondylosis, such as herniated discs, small joint misalignment compressing the nerve roots in the neck and shoulder and the back, which may also cause paroxysmal cramps and pain in the back.