Pregnant women are a relatively special group, as the fetus in the womb can form a greater pulling force on the lumbar and thoracic vertebrae, so there is a change in the position and direction of the force on the vertebral area, and the vertebrae or discs rub together to produce pain, which can resolve on its own after birth. At the same time, pregnant women should avoid using the same standing or sleeping position for a long time, so that the pain can be relieved by changing the direction of the force in time.