The main form of anesthesia for cesarean section is intrathecal anesthesia, including epidural and subarachnoid anesthesia, which is commonly known as lumbar anesthesia. Or the combination of epidural and lumbar anesthesia, called lumbar – hard joint anesthesia. However, special patients are not suitable for intrathecal anesthesia, only general anesthesia can be used, and inhalation anesthetics are usually used. Although inhalation anesthetics will be delivered to the baby through the placenta, the amount is very small and basically will not affect the fetus. High concentration of inhalation anesthetics will cause uterine relaxation, which is conducive to the delivery of the placenta, but may cause weak uterine contractions, causing postpartum hemorrhage. Clinically, anesthesiologists will adjust the appropriate concentration of inhalation anesthetics to meet the needs of surgery on the one hand, and not to increase the risk of postpartum hemorrhage on the other hand, so it is safe to use inhalation anesthetics for cesarean delivery. For example, some special patients, such as patients with coagulation disorders or lumbar disc herniation or spinal deformity, are not suitable for intralesional anesthesia, so only general anesthesia can be used.