Anesthesia with anesthetic on the spinal cord is called intradural anesthesia. Intradural anesthesia is a blind exploration operation and may result in: i. Epidural cavity hematoma, the main risk factor is patients with abnormal coagulation function. Second, headache after epidural puncture, during the epidural puncture, puncturing the subarachnoid space will result in clinical symptoms of low cranial pressure and headache. Third, nerve root spinal cord injury, in the process of puncture, penetration to the nerve root spinal cord will cause injury to the nerve root spinal cord. Fourth, local anesthetic neurotoxicity, which can lead to limb numbness and even paraplegia. Fifth, during the epidural nerve block, the injection of local anesthetic in the epidural cavity into the submural cavity can cause total spinal anesthesia, which can cause respiratory and cardiac arrest in severe cases. Sixth, in the process of epidural catheter extraction, there is a possibility that the catheter may be broken or fractured in the epidural cavity, and the catheter may be broken in the body during violent extraction. VII. Headache may occur after intradural anesthesia, and individual patients may experience back pain after anesthesia.