Paget's disease is a chronic bone disorder caused by excessive breakdown and abnormal regrowth of bone tissue. It most commonly affects the pelvis, femur, tibia, and skull. While the exact cause is unknown, it often runs in families and has been linked to viral infections. Patients may experience pain, bone deformities, arthritis, and hearing loss. Diagnosis involves blood tests and imaging studies, while treatment focuses on managing pain and slowing bone turnover through medications like bisphosphonates. Nursing care centers on fall prevention, monitoring for complications, and providing education about the condition.