The most common causes of bone deformation are as follows: 1, abnormal bone development, from embryonic development or birth there is a deformity of bone development, such as scoliosis, or malnutrition after birth, especially pediatric hypocalcemia, causing rickets, chicken chest, etc., from birth to 2 years old can see the abnormal shape, as the age of increasing deformity more obvious. 2, fracture deformation healing, fracture is not timely treatment of deformation healing, resulting in bone thickening, deformation, distortion, angle, etc., if the deformation is mild, the film can be found, if it is more serious can also appear abnormal shape. 3, bone tumors, such as giant cell tumor of bone, adolescence can appear bone joint enlargement, deformation, and in serious cases can appear pathological fracture, often this In this case, surgery is required. Please go to the hospital for further consultation to clarify the specific causes.