If a child has developed rickets and has already shown deformities such as pigeon chest, this indicates that the child is in the later stages of the active phase, meaning that a clear skeletal deformity has occurred. As the child ages, there may also be deformities in the lower limbs as the child begins to stand and walk, such as bowlegs or knock-knees, or a K-shaped leg deformity. Gradually, the child will enter the sequelae phase, which is more common in children over the age of two. In infancy, due to severe rickets, different skeletal deformities may remain without any other clinical symptoms. Blood biochemical indicators are normal, and X-ray examinations will show that the pathological changes at the epiphyseal ends of the bones have disappeared. Generally, no treatment is required, but if there are obvious deformities, corrective treatment may be necessary.