X-shaped legs at the age of 3 need to be corrected to prevent the long-term development of X-shaped legs, which will affect the child’s future life and work. It is recommended to go to the hospital in time for examination and treatment as soon as possible. For children with mild symptoms, they can be corrected by wearing braces, and they should also go to the hospital for regular checkups in order to facilitate rapid recovery. If the deformity of the legs is more serious, it is necessary to go to the hospital in time for evaluation, treatment of the primary cause of X-shaped legs, and if necessary, surgical treatment. In addition, children can play sports, such as playing shuttlecock, etc. Meanwhile, children should pay attention to maintaining a proper sitting or standing posture, and their diets can be supplemented with calcium, vitamins and proteins, which will help the development and recovery of the bones.