Currently, medicine has transitioned from a simple biomedical model to a BPS model. Embracing the perspective of "Big Health," traditional Chinese medicine (TCM) fully leverages its advantages in prevention and treatment, promoting cross-disciplinary integration through "TCM+" approaches. This is crucial for enhancing the capability of TCM services and facilitating its high-quality development. It also aligns with the concept of "preventing illness before it occurs" as emphasized in the Yellow Emperor's Inner Canon. In this video, we present an introduction to the diagnosis, etiology and pathogenesis, clinical manifestations, and treatment methods of diabetes. Furthermore, we explore the significance and approaches of tertiary prevention for diabetes, in alignment with the "preventing illness before it occurs" concept.