Rickets in two-year-old infants is caused by a deficiency in vitamin D leading to a disturbance in calcium and phosphorus metabolism, resulting in abnormal skeletal development. This class of systemic, chronic, nutritional diseases typically manifests in two-year-olds who are able to walk and stand. Due to the force of gravity, lower limb deformities may develop, leading to bowlegs or knock-knees, and possibly even a 'K'-shaped limb deformity. The spine may also develop kyphosis or scoliosis. Around the age of two, it is generally the residual stage of the disease, which often does not require pharmacological treatment. For mild to moderate cases, physical exercise should be enhanced, and active or passive rehabilitation methods should be used to correct skeletal deformities. It is recommended to seek treatment in the pediatric rehabilitation department; severe skeletal deformities may require surgical correction.