Abstract:Chronic pain, as a significant public health issue with long-term impacts on patients' quality of life, poses numerous challenges to current treatment strategies due to its complex pathogenesis. In recent years, endoplasmic reticulum stress, characterized by imbalanced cellular homeostasis, has garnered widespread attention in the field of chronic pain research. This study systematically reviews the specific mechanisms of endoplasmic reticulum stress, focusing on the pathways involving PKR-like endoplasmic reticulum kinase (PERK), inositol-requiring enzyme 1α (IRE1α), and Activating Transcription Factor 6 (ATF6), and their roles in chronic pain. The association of these pathways with pain perception, nociceptive signaling, inflammatory responses, and neural plasticity changes is discussed. By gaining deeper insights into the role of endoplasmic reticulum stress in chronic pain, the aim is to provide novel strategies and approaches for the treatment of chronic pain, with the ultimate goal of improving patients' quality of life and alleviating the burden on healthcare systems.