Distal radioulnar joint instability is a common clinical condition that can be either acute or chronic. Its management requires extensive knowledge of all the anatomical structures around the wrist area. The clinical examination must identify all damaged structures in order to define a customized reconstruction strategy. The aim of treatment is to prevent the development of chronic instability and/or arthritic lesions, which can only be treated with palliative surgery. Distal radioulnar instability is complex. Its management shares similarities with that of knee instability, with a wide range of conditions ranging from a sprain with isolated ligament tear to complex dislocation in which multiple ligaments are torn. In particular, the triangular fibrocartilage complex, which is a pillar of distal radioulnar joint stability, is not the sole stabilizer of this joint. The treatment strategy is not as simple as just reattaching this ligament to treat all of the acute and chronic clinical signs. The goal of the present study is to describe the various structures and possible lesions in this joint and then how to repair them. The diagnostic and therapeutic difficulties justify treatment at a specialized center.