Nonunion refers to a condition where a broken bone fails to heal properly, resulting in a lack of bone union. This can occur due to various factors, including inadequate blood supply, infection, or improper alignment of the fracture. Nonunion can lead to persistent pain and functional impairment, making it a significant concern in orthopedic medicine. Treatment for nonunion often involves surgical intervention, such as the use of bone grafts or internal fixation devices to promote healing. In some cases, electrical stimulation may also be employed to encourage bone growth. Early diagnosis and appropriate management are crucial for improving outcomes.