One and a half years old walking inside eight, indicating the possible existence of knee valgus, may be physiological factors, rickets, fracture deformity healing and other factors. Different causes, correction methods are not the same ah, according to the cause of the targeted treatment, generally including conservative treatment and surgical treatment. 1. Physiological factors: for physiological factors caused by knee valgus, generally not serious, do not need special treatment, with the child’s bone development, can improve on their own. 2. Rickets: For the knee valgus caused by rickets, when it is not too serious, it should be supplemented with calcium, such as vitamin D, etc., and sunbathing, and it can be corrected by using orthopedic braces, and if the knee valgus is more serious, it should be considered to be corrected by surgery. 3. Fracture deformity healing: for the fracture deformity healing caused by knee valgus, affecting the daily walking, can be considered for surgical treatment. The child walks within the eight recommended timely diagnosis, according to the cause of different targeted treatment. Drugs need to be used under the guidance of a doctor.