Generally speaking, o-legs can be improved through conservative treatment and surgery. O-leg, also known as inversion of the knee, is a bone and joint deformity in which the patient’s legs are able to come together but the knees are not able to come together when the patient is lying down or standing normally. It is usually caused by calcium deficiency and genetic factors, and the main cause of the disease is incorrect standing, sitting and walking postures. 1. Conservative treatment: Conservative treatment can be bandaged, wearing corrective instruments for o-legs and corrective shoes to adjust the balance of soft tissues in the knee joint to achieve therapeutic effect. 2. Surgery: If the effect of conservative treatment is poor, corrective surgery can be performed to change the bone structure and correct o-leg deformity. If patients have o-leg, they should go to the hospital for examination and treatment in time.