Hunchback is a common term, many people call it so, in medical terms the disease refers to a form of thoracic vertebral lordosis. The three common diseases that cause abnormal spine form are rickets, ankylosing spondylitis and age-related osteoarthrosis. If the hunchback is congenitally formed, it is mainly considered to be caused by rickets and ankylosing spondylitis; if the hunchback is formed in the elderly within a few months, it may be mainly due to osteoporosis and fracture in old age.