Induced labor is anesthetized in the lumbar vertebral space, induced labor will appear after the contractions, which is usually referred to as paroxysmal pain. These contractions are weak and strong, and gradually form regular contractions, regular contractions will make the uterus slowly dilate, and then there will be very serious contraction pain. In order to reduce the pain of contractions, painless labor can be used. Painless labor is now strongly advocated by the state, painless labor can effectively reduce the pain of contractions without affecting the progress of labor. Painless labor is a needle and tube inserted into the lumbar spine, connected to a pain pump, which continually pumps pain medication, thus greatly reducing the pain of contractions. Because the anesthetic is injected into the intervertebral system, it does not enter the bloodstream, so it is safer for both the pregnant woman and the baby. Painless labor is usually used when the pregnant woman has regular contractions and the uterine opening is two or three centimeters wide.