“O”-shaped legs, also known as the inner eight, “x”-shaped legs, also known as the outer eight, is a complication of rickets, the disease is a diagnostic term, that is, we often say “calcium deficiency”, the main cause is calcium It is a diagnostic term for what we often call “calcium deficiency”, which is mainly caused by insufficient calcium supplementation or malabsorption, and of course the rare “hypophosphatemic rickets”. The source of calcium depends on breast milk within 4 months, so the mother’s dietary choices are very important, try to reduce the high protein diet, high calorie diet not only rapidly increase the mother’s body weight, but also dilute the calcium content of breast milk, grains and cereals are rich in micronutrients, produce balanced milk, some mothers would like to take calcium supplements to increase the calcium content of breast milk, according to the scientific research is futile, the increase of calcium in milk is only the mother’s intake of calcium, but the increase of calcium in the milk is only the mother’s intake of calcium, the increase of calcium in breast milk is only the mother’s intake of calcium. Increase only one tenth of the mother’s intake, therefore, it is recommended that infants 4 months before the main breast milk, at the same time to make the baby more sun exposure, the best time period is 10:00 a.m. to 4:00 p.m. in winter, summer 10:00 a.m. before 4:00 p.m., in the balcony when you want to open the window (the glass blocks ultraviolet rays up to 60%), exposing the baby’s head and limbs, the baby’s back to the sun to avoid the sunlight directly under its eyes, but also can cover the eyes! . Mixed feeding and early calcium supplements for infants after 4 months, some people worry that too much calcium supplementation will make the child’s fontanel close prematurely or hardening of the bones affecting the child’s growth, which is unreasonable, according to the American Dietetic Association’s annual bulletin and the scientific basis for the intake of calcium is to eat more and more rows, like the intake of salt will not be deposited in the body. Jinan Children’s Hospital Pediatric Surgery Sun Liquan Under the current policy, most of the families have only one child, is the baby of the family, leisure time will be in the rotation of several generations under the care of the armpits, the hands of its armpits constantly bouncing on the knees to play, which is often the baby legs bending inward and outward eight deformation. To be able to walk on their own or take off the winter clothes only to find the deformity of the legs, sometimes only after seeing the difference between the surrounding children and their own children to pay attention to, some parents complain that the child’s legs are not the same as the thick, or the child’s knee joints on the inner side of the enlargement, which are the sequelae of rickets. The appearance of the above symptoms neither affects the child’s walking nor its growth and development, but only affects aesthetics. As children are the center of the family, they are always worried about whether the disease will worsen in the future and whether it will affect their future, even though the parents cannot tell what they are afraid of being affected. As a surgeon, we are very concerned about this problem and propose early intervention. Many parents believe in the traditional concept of binding at home, or consulting the advice of familiar health care professionals (non-pediatrics) around them, preferring to believe that “the tree is bigger than the tree itself”, and do not have time to go to a regular pediatric surgeon, and then after the child is 4 years old, either do not treat the disease or surgery, the pain is unbearable. Once again, we recommend early intervention. Our recommendations are: 1. Most people do not need treatment, i.e., the tree will straighten itself, but it is important to have it examined, especially in children up to one and a half years old. 2. 2. There comes a time when a crooked tree can’t grow straight, why else would there be a crooked tree? Early intervention will greatly increase the chances of “self-straightening”. 3. The method of binding the legs at home is not based on science. At present, there are professional orthopedic technicians (who have obtained the national professional qualification certificate) all over the world. The development of appropriate orthopedic devices to treat a variety of rickets deformities. This is first of all in the pediatric surgeon’s advice before a professional technician customized individualized molds to treat. 4. Before the treatment, it is necessary to see a pediatric surgeon in order to determine whether it is a complication of rickets or not (some leg deformities are caused by other diseases that can not be treated in this way, but also delay the treatment, or even get worse results). 2 years and a half is the best time, and after the age of 4 years, if the correction is not satisfactory, the only solution is to correct it surgically. 5. The wearing of orthotic device is divided into “day-use type” and “night-use type”, most of them only need “night-use type”, and they can get good correction at night without realizing it, which neither affects the normal activities of the children during the day nor aggravates the normal activities of the children and their families. It does not affect the normal activities of the child during the day, and does not increase the psychological burden of the child and the parents (for fear of jokes from the people around them and their buddies). 6, no matter when to wear, must go to professional orthopaedic center, and should be followed up regularly, the child is in the developmental period, the body changes will be very big, orthopaedic appliances also need to be adjusted with the changes of the child.