Calf belly inversion is generally referred to as O-shaped legs, mainly take drug treatment, brace correction or surgical correction. 1. Medication: some children have O-shaped legs, mainly due to the lack of trace elements in the body, mostly due to the lack of vitamin D and calcium, need to be directed by the doctor to supplement vitamin D and calcium, such as taking calcium carbonate, calcium lactate, calcium gluconate, etc., and usually take more children to the sun, to promote the absorption of vitamin D and calcium. 2. Brace correction: for small children, if the O-shaped leg is serious, you can wear lower limb orthopedic braces, which have the effect of fixing the foot shape, and the O-shaped leg can be corrected in a long time. 3. Surgical correction: If the children’s O-shaped leg is more serious, the effect of conservative treatment is not good, you can take the surgical correction, has been an adult O-shaped leg patients, can also take the surgical correction. Calf belly inversion should be timely to the hospital, after a clear diagnosis with the doctor for treatment.