A hunchback is not all scoliosis, but can also be a backward curve and deformity. The occurrence of hunchback may be caused by youthful hunchback, ankylosing spondylitis, mucopolysaccharide metabolism disorder and other diseases. 1. Youthful hunchback: It is mainly caused by long-term hunchback writing. The thoracic segment of the spine bends backward, so that the pressure on the front of the vertebrae is greater than that on the back, and the necrosis of the epiphysis in the front affects the development of the height of the front half of the vertebrae. 2. Ankylosing spondylitis: it is a chronic progressive inflammation of the spine, which may also be caused by infectious factors. With the progression of the disease, the lumbar vertebrae firstly lose their anterior convex curve, and then the thoracic vertebrae become posterior convex and show a hunchback deformity. 3. Mucopolysaccharide metabolism disorder: mainly due to lysosomal enzyme defects, progressive joint deformity, kyphosis or scoliosis can occur. It is common to see chicken chest, hunchback and knee valgus. It is recommended that patients with hunchback go to the hospital in time and follow the doctor’s instructions for treatment to avoid delaying their condition.