Abstract:Remifentanil is an opioid medication widely used in clinical practice due to its rapid onset, short half-life, and lack of accumulation with prolonged infusion. Apart from its analgesic effect during surgery, remifentanil can also increase postoperative pain sensitivity, a condition known as Remifentanil-Induced Hyperalgesia (RIH), which significantly affects patients' postoperative recovery and quality of life. The mechanisms behind the development of RIH are complex and intricate. This article reviews recent progress in the understanding of the mechanisms and preventive strategies for RIH, aiming to provide theoretical references for future molecular mechanism research and clinical treatment strategies.