There are many diseases that can cause bone deformation, and we will briefly explain the causes of deformation. First, bone infections, including osteomyelitis and bone tuberculosis, can cause bone destruction, resulting in bone deformation. Second, bone tumors, tumors in the bone can also cause bone invasion and destruction, resulting in a decrease in bone strength, leading to deformation or pathological fractures. Third, inflammation, inflammation of bone is mainly seen in chronic strain and injury caused by aseptic inflammation, which can also cause bone deformation due to local inflammatory stimulation. Fourth, congenital diseases, such as congenital dysplasia of bone or abnormal bone metabolism caused by congenital diseases, can also lead to bone deformation. Fifth, trauma, due to trauma resulting in deformed bone fractures. Sixth, systemic metabolic diseases, such as hyperparathyroidism, hypothyroidism, kidney disease, etc., can lead to abnormal calcium and phosphorus metabolism in the body, resulting in abnormal bone metabolism, resulting in bone deformation due to a decrease in the strength and toughness of the bone.