Spinal anesthesia is a type of regional anesthesia which is used to numb the lower half of the body. It is injected into the lower back, and the substances used can help to block sensory, motor, and autonomic nerve impulses. Spinal anesthesia can be used to control pain in lower abdominal, pelvic, and lower-limb procedures such as cesarean sections, hernia repair, and hip surgery. This technique is less invasive than general anesthesia and has fewer potential side effects. It also typically produces a shorter recovery time. Additionally, spinal anesthesia can reduce the risk of postoperative nausea and vomiting.