In the past, the traditional way of postoperative pain relief was to respond to the nurse when the patient felt pain first, and then notify the on-duty or attending physician to deal with it. Then the doctor prescribes painkillers based on the drugs taken by the patient, the surgical method, and the surgical site. It is then administered to the patient by the nursing staff, which usually takes more than 30 minutes In addition to suffering for pain for patients, repeating this process will also make the patients’ pain receptors constantly stimulated and sensitized. Eventually developed into the problem of ” Chronic post-surgical pain (CPSP)” Now the latest “multimodal analgesia” concept is the use of 7-day long-acting analgesic with short-acting analgesic Pre-administration before pain can avoid excessive stimulation of pain receptors and cause ” Chronic post-surgical pain (CPSP)” problems.