Scoliosis is a sideways curvature of the spine that can be classified into non-structural and structural types, with various subtypes such as idiopathic and congenital scoliosis. Diagnosis typically involves physical examinations and imaging techniques, while treatment options range from observation for mild cases to bracing and surgery for more severe forms. Key risk factors include age, gender, and genetics, emphasizing the need for physical therapy and management strategies to improve outcomes.