O shaped (type) legs can be corrected. O-shaped leg, also known as inversion of the knee, can be physiologic or pathologic, and can be corrected by conservative treatment or surgery. 1. Conservative treatment: In infancy and early childhood, knee entropion is mostly physiological, and with age, knee entropion will gradually disappear and self-correct to basically normal; or when the O-shaped leg is more obvious, it can be corrected by wearing a brace, splinting the leg and other methods. 2. Surgery: When the pathologic knee valgus is serious, surgery can be used to correct it, usually with high osteotomy and internal fixation. If the diagnosis of O-shaped leg is confirmed, it is recommended to go to the hospital in time and carry out standardized treatment under the guidance of the doctor in order to reduce the adverse effects.