1.Is it possible to have hemorrhoid surgery without pain? Hemorrhoid surgery is painless mainly relying on intraoperative anesthesia, which commonly includes sacral block anesthesia, spinal anesthesia (lumbar anesthesia), epidural anesthesia and several other methods. However, either local anesthesia, lumbar anesthesia or sacral anesthesia only solves the problem of pain relief during and for a short time after surgery. Patients often feel great pain after anal surgery due to trauma pain for up to 10 days. In recent years, a long-acting anal analgesic, a compound injection, has been widely used in anorectal medicine, which basically solves the problem of pain in the incisional wound after anal surgery, and the analgesic effect can reach 1-3 weeks as long as the operation method and dosage are correctly mastered. In addition, inserting anti-inflammatory analgesic suppositories in the anus after surgery, taking oral or intramuscular analgesic injection after surgery, as well as careful and fine operation during surgery to minimize tissue damage and reduce postoperative local edema to the minimum are all good methods to avoid postoperative pain. 2.Why do long-acting anesthetics have analgesic effects? Local long-acting analgesic is a compound injection that basically solves the problem of pain relief after hemorrhoid fistula surgery. As long as the correct method of operation and the dosage used are mastered, the pain relief effect can last 1-3 weeks. Within 4-6 hours after local injection, it can cause reversible damage to the nerve endings, achieving blocked conduction, local sensation dulling, and pain reduction or disappearance, but the sphincter function is normal, which will not cause anal incontinence, and can prevent anal sphincter spasm, thus avoiding the occurrence of pain and reflex urinary retention during stooling after surgery.