Spinal anesthesia is the injection of a local anesthetic into the spinal canal around a nerve through a specific puncture needle to anesthetize a certain area of the body. Spinal anesthesia is a larger concept that includes lumbar and epidural anesthesia, and the now more popular combined lumbar and epidural anesthesia, which is produced by the reversible action of drugs into the nervous system. The central part of the human nervous system is composed of the brain and spinal cord, and the peripheral nerves in the nervous system are emitted from the brain and spinal cord, and outside the spinal cord is a protective structure composed of fluid and many layers of membrane structures, which are wrapped by fat and vertebral canal, and the vertebral canal refers to the spine, which is often referred to as the vertebrae. The spinal canal is the tubular cavity within the vertebrae. To accomplish this anesthesia requires the patient’s cooperation. Because the gap between the vertebrae is narrow and some gaps have an inclined angle, the puncture needle needs to be well positioned to bypass the bone and reach the spinal canal, that is, the patient has to be in a good position as required, and the adjustment of the scope of intraspinal anesthesia also requires the cooperation of the patient. Intraspinal anesthesia also has complications. During the anesthesia, if discomfort occurs, it should be explained in time, but the patient should not panic or move around.